एपीए उद्धरण

Krouwel, B. (1998). Outdoor Deyelopment. Crest.

शिकागो स्टाइल उद्धरण

Krouwel, Bill. Outdoor Deyelopment. New Delhi: Crest, 1998.

एमएलए उद्धरण

Krouwel, Bill. Outdoor Deyelopment. Crest, 1998.