APA引文

GAY JOSHUA. (2002). FREE SOFTWARE FREE SOCIETY. GNU PRESS.

芝加哥风格引文

GAY JOSHUA. FREE SOFTWARE FREE SOCIETY. BOSTON: GNU PRESS, 2002.

MLA引文

GAY JOSHUA. FREE SOFTWARE FREE SOCIETY. GNU PRESS, 2002.

警告：这些引文格式不一定是100％准确.