एपीए उद्धरण

Alfred Wirthmann. (1927). Geomorphology of the tropics. Springer.

शिकागो स्टाइल उद्धरण

Alfred Wirthmann. Geomorphology of the Tropics. New York: Springer, 1927.

एमएलए उद्धरण

Alfred Wirthmann. Geomorphology of the Tropics. Springer, 1927.