एपीए उद्धरण

Gregory, P. H. (1974). Phytophthora disease of cocoa. Longman publishers.

शिकागो स्टाइल उद्धरण

Gregory, P H. Phytophthora Disease of Cocoa. London: Longman publishers, 1974.

एमएलए उद्धरण

Gregory, P H. Phytophthora Disease of Cocoa. Longman publishers, 1974.