एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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