Citation for book in general:
Sargent, A., & Sargent, J. S. (1895). Sargent genealogy: Hugh Sargent, of Courteenhall, Northamptonshire and his descendants in England. Somerville, Mass: A. Sargent.
My citation for this image needs to indicate that it came from the copy of the book at the Allen County Public Library--usually genealogists suggest that citations to published materials not be specific to the library. This is an exception because the library version contains original manuscript-type material that is not in every other published copy of the book.
We're crafting a citation specific to this text and will have one in a future post.