Παραπομπή APA

Singh, J. (2010). Ecotourism. I.K. International.

Παραπομπή Chicago Style

Singh, Jagbir. Ecotourism. New Delhi: I.K. International, 2010.

Παραπομπή MLA

Singh, Jagbir. Ecotourism. I.K. International, 2010.