APA引文

Rojas, C. (1999). Ecologically dangerous and economically uncertain tourism.

Citación estilo Chicago

Rojas, Carmen. Ecologically Dangerous and Economically Uncertain Tourism. 1999.

MLA引文

Rojas, Carmen. Ecologically Dangerous and Economically Uncertain Tourism. 1999.

警告：這些引文格式不一定是100％准確.