एपीए उद्धरण

Greenland, D. (1977). The Earth In Profile: A physical Geography. Canfield press.

शिकागो स्टाइल उद्धरण

Greenland, David. The Earth In Profile: A Physical Geography. Sanfrancissco: Canfield press, 1977.

एमएलए उद्धरण

Greenland, David. The Earth In Profile: A Physical Geography. Canfield press, 1977.