Waugh, T. (1996). Hard to imagine: Gay male eroticism in photography and film from their beginnings to Stonewall. Columbia University.
Chicago-Zitierstil (17. Ausg.)Waugh, Thomas. Hard to Imagine: Gay Male Eroticism in Photography and Film from Their Beginnings to Stonewall. New York: Columbia University, 1996.
MLA-Zitierstil (8. Ausg.)Waugh, Thomas. Hard to Imagine: Gay Male Eroticism in Photography and Film from Their Beginnings to Stonewall. Columbia University, 1996.
警告：这些引文格式不一定是100％准确.