APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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