This is how I cited a genealogy I inherited using the format:
Author (last name, first name) if there is one; Title of the genealogy if there is one; Place of publication if there is one; Publisher if there is one; Date if there is one.
In the case of the record below, the document was hand-written by my cousin Ort. Skip whatever parts of the citation you lack.
Bachelor, Ort L. ''Taylor ~ Smith Family Record Property of Orra Burch This Record includes only the trees of the Taylors and Smith Families as given in my Record book.'' Undated.