APA引文

KEEGAN, D. (1996). Foundations of distance education.-- Ed. 3. Routledge.

芝加哥风格引文

KEEGAN, Desmond. Foundations of Distance Education.-- Ed. 3. London: Routledge, 1996.

MLA引文

KEEGAN, Desmond. Foundations of Distance Education.-- Ed. 3. Routledge, 1996.

警告：这些引文格式不一定是100％准确.