एपीए उद्धरण

(1974). Environmentar geomorpholoy and landscape coservation. Stroudshurg.

शिकागो स्टाइल उद्धरण

Environmentar Geomorpholoy and Landscape Coservation. Stroudshurg, 1974.

एमएलए उद्धरण

Environmentar Geomorpholoy and Landscape Coservation. Stroudshurg, 1974.