Citation Issues

So I am struggling with this one a lot.  I was given a link to a database with to access Lutheran records in Lithuania.  The records are kept at the archive there and I used to purchase copies from there until the President of IAGL Online indexing told me of their having digitized and indexed a large amount of records.

I have searched for evidence of an early 19th century Washington Co. PA marriage on Ancestry, FamilySearch.org, and through a related PA genealogical society, with negative results.  If I want to publish this case study, what would be a good way of citing those negative results. There are a lot of record groups involved.

Help, I'm new to source citation. Any help/feedback you can provide to refine this citation would be most appreciated.

Joseph Smith painting (1971, by Adrian Lamb, Record ID: npg_NPG.71.43), web page; selected data, National Portrait Gallery - Smithsonian Institution, website, path: > The Portraits > Search the Collection: “NPG.71.43” (https://npg.si.edu/object/npg_NPG.71.43 : accessed 11 August 2023); citing: Data Source: National Portrait Gallery.

   Let me bring an issue I initially raised on another website to this authoritative source. Following EE guidance, I had drafted a citation for a Draper Manuscripts entry that I had found on microfilm. My draft citation apparently had several unspecified issues. Here’s my draft citation (missing the roll number):

I have found a power of attorney document on FamilySearch. After reading at EE 10.7, I crafted the following citation, but I'm not sure if it needs adjustment:

Dane County, Wisconsin, Dane County (Wis.) deed indexes (1835-1915), deeds (1836-1886, and miscellaneous records (1854-1916), Miscl. Record O: 484-485, Mrs. Jane Culmer to A. Pickarts, power of attorney, 31 July 1866; digital images, "v. M(p. 358-end) - v. O 1864-1869," image 687. FamilySearch (https://www.familysearch.org/search/catalog/116287 : accessed 31 Jul 2023).

I was recently able to research at the Wisconsin State Archives, and I found documents related to the Civil War service of my 3rd-great-grandfather. I have crafted this citation for the entire collection:

Edward Gee Miller, "Civil War papers, 1861-1906," Wis Mss 62S MAD 4/12/E6; Wisconsin Historical Society Archives, Madison.

I used information from the UW-Madison library catalog: https://search.library.wisc.edu/catalog/9911125352502121

In 2020, I purchased an image from The National Archives. The images were indexed online, but only available for purchase and digital delivery. Now, I'm wondering if I cited it in a reasonable manner.

Hello, I would appreciate advice regarding this waypoint citation. The image link is https://www.onland.ca/ui/4/books/80225/viewer/682762890?page=90

My attempt is:

Trying to cite images of British Electoral Registers, hosted at FindMyPast, poses some issues for me. The registers are imaged as published works, but the indexing does not always accurately reflect the content of the imaged work. This means that, while one could locate the item-of-interest in the physical work, using the search page could cause some grief. So; while I've used the "basic book format", I've included extra detail and  notes to hopefully ease the task of re-locating the image on the host site.

Does the following seem reasonable?

I am working with citations to FamilySearch vital records in several counties in Michigan. For birth and marriage records, FS has the databases "Michigan, County Births, 1867-1917" and "Michigan, County Marriages, 1820-1940". Both of these databases also have images. I am leading with the original document, not the database.

For the birth record, I have created the following footnote: