Elements to include (Rule)
Author (if applicable) / Title of the item / date of the item / item number (if applicable) / series title (if applicable) / series number (if applicable) / name of the collection (if applicable) / collection number (if applicable) / name of the depository or archive / location of depository (if applicable) / URL or DOI or name of database (if applicable)
"In a note, the main element of a manuscript citation is usually a specific item (a letter, a memorandum, or whatever) and is thus cited first. In a bibliography, the main element is usually either the collection...,the author(s)..., or the depository. ”
In a bibliography: "Entries are usually listed under the name of the collection or under the author(s) of the items contained therein...If only one item from a collection has been mentioned in text or in a note and is considered important enough to include in a bibliography, the entry will begin with the item."