Berger, R. M. (1982). Gay and gray: The older homosexual man. University of Illinois.
Lua i Stíl Chicago (17ú heag.)Berger, Raymond M. Gay and Gray: The Older Homosexual Man. Urbana, Ill.: University of Illinois, 1982.
Lua MLA (8ú heag.)Berger, Raymond M. Gay and Gray: The Older Homosexual Man. University of Illinois, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.