توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Marcus, E. (1993). Is it a choice?: Answers to 300 of the most frequently asked questions about gays and lesbians. HarperSanFrancisco.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Marcus, Eric. Is It a Choice?: Answers to 300 of the Most Frequently Asked Questions About Gays and Lesbians. San Francisco: HarperSanFrancisco, 1993.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Marcus, Eric. Is It a Choice?: Answers to 300 of the Most Frequently Asked Questions About Gays and Lesbians. HarperSanFrancisco, 1993.