APA-ийн эшлэл(7 дахь хэвлэлт)
Waugh, T. (1996). Hard to imagine: Gay male eroticism in photography and film from their beginnings to Stonewall. Columbia Univ. Press.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Waugh, Thomas. Hard to Imagine: Gay Male Eroticism in Photography and Film from Their Beginnings to Stonewall. New York: Columbia Univ. Press, 1996.
MLA -ийн эшлэл (9 дэх хэвлэлт)
Waugh, Thomas. Hard to Imagine: Gay Male Eroticism in Photography and Film from Their Beginnings to Stonewall. Columbia Univ. Press, 1996.
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