APA引文

Hofer, H. (1991). Insight guides: Singapore. APA Pub.

芝加哥风格引文

Hofer, Hans. Insight Guides: Singapore. Singapore: APA Pub, 1991.

MLA引文

Hofer, Hans. Insight Guides: Singapore. APA Pub, 1991.

警告：这些引文格式不一定是100％准确.