APA引文

Witherick, M. E. (1990). Population geography. Longman.

芝加哥风格引文

Witherick, M. E. Population Geography. London: Longman, 1990.

MLA引文

Witherick, M. E. Population Geography. Longman, 1990.

警告：这些引文格式不一定是100％准确.