Karlen, A. (1988). Threesomes: Studies in sex, power, and intimacy / Arno Karlen (1. Auflage.). Morrow.
Lua i Stíl Chicago (17ú heag.)Karlen, Arno. Threesomes: Studies in Sex, Power, and Intimacy / Arno Karlen. 1. Auflage. New York: Morrow, 1988.
Lua MLA (8ú heag.)Karlen, Arno. Threesomes: Studies in Sex, Power, and Intimacy / Arno Karlen. 1. Auflage. Morrow, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.