एपीए उद्धरण

Collings, G. H. (1955). Commercial fetilizers their sources and use (Ed.5.).

शिकागो स्टाइल उद्धरण

Collings, Gilbert H. Commercial Fetilizers Their Sources and Use. Ed.5. 1955.

एमएलए उद्धरण

Collings, Gilbert H. Commercial Fetilizers Their Sources and Use. Ed.5. 1955.