एपीए उद्धरण

Hudson, N. (1981). Soil conservation. New York: Cornell Univ. Press.

शिकागो स्टाइल उद्धरण

Hudson, Norman. Soil Conservation. New York: Cornell Univ. Press, 1981.

एमएलए उद्धरण

Hudson, Norman. Soil Conservation. New York: Cornell Univ. Press, 1981.