Marcus, E. (1993). Is it a choice?: Answers to 300 of the most frequently asked questions about gays and lesbians. HarperSanFrancisco.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিMarcus, Eric. Is It a Choice?: Answers to 300 of the Most Frequently Asked Questions About Gays and Lesbians. San Francisco: HarperSanFrancisco, 1993.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিMarcus, Eric. Is It a Choice?: Answers to 300 of the Most Frequently Asked Questions About Gays and Lesbians. HarperSanFrancisco, 1993.
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