एपीए उद्धरण

Prasad, P. G. (2012). Ecotourism and its development. Altar.

शिकागो स्टाइल उद्धरण

Prasad, P.N. Girija. Ecotourism and Its Development. New Delhi: Altar, 2012.

एमएलए उद्धरण

Prasad, P.N. Girija. Ecotourism and Its Development. Altar, 2012.