Engel, S. M. (2001). The unfinished revolution: Social movement theory and the gay and lesbian movement. Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoEngel, Stephen M. The Unfinished Revolution: Social Movement Theory and the Gay and Lesbian Movement. Cambridge: Cambridge University Press, 2001.
Deismireacht MLAEngel, Stephen M. The Unfinished Revolution: Social Movement Theory and the Gay and Lesbian Movement. Cambridge: Cambridge University Press, 2001.
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