Marcus, E. (1993). It is a choice?: Answers to 300 of the most frequently asked questions about gays and lesbians / Eric Marcus (1. Auflage.). HarperSanFrancisco.
Cita Chicago (17th ed.)Marcus, Eric. It Is a Choice?: Answers to 300 of the Most Frequently Asked Questions About Gays and Lesbians / Eric Marcus. 1. Auflage. San Francisco: HarperSanFrancisco, 1993.
Cita MLA (8th ed.)Marcus, Eric. It Is a Choice?: Answers to 300 of the Most Frequently Asked Questions About Gays and Lesbians / Eric Marcus. 1. Auflage. HarperSanFrancisco, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.