APA引文

Sethi, P. (2002). Essentials of sustainable tourism. Rajat.

Chicago Edition Citation

Sethi, Praveen. Essentials of Sustainable Tourism. New Delhi: Rajat, 2002.

MLA引文

Sethi, Praveen. Essentials of Sustainable Tourism. Rajat, 2002.

警告：這些引文格式不一定是100％准確.