Greif, M. (1989). The gay book of days: An evocatively illustrated who's who of who is, was, may have been, probably was, and almost certainly seems to have been gay during the past 5,000 years (1. Auflage.). Lyle Stuart/Main Street Press.

Greif, Martin. The Gay Book of Days: An Evocatively Illustrated Who's Who of Who Is, Was, May Have Been, Probably Was, and Almost Certainly Seems to Have Been Gay During the Past 5,000 Years. 1. Auflage. New York: Lyle Stuart/Main Street Press, 1989.

Greif, Martin. The Gay Book of Days: An Evocatively Illustrated Who's Who of Who Is, Was, May Have Been, Probably Was, and Almost Certainly Seems to Have Been Gay During the Past 5,000 Years. 1. Auflage. Lyle Stuart/Main Street Press, 1989.