एपीए उद्धरण

(1968). Fertilizer production, technology and use. New York: United Nations.

शिकागो स्टाइल उद्धरण

Fertilizer Production, Technology and Use. New York: United Nations, 1968.

एमएलए उद्धरण

Fertilizer Production, Technology and Use. New York: United Nations, 1968.