एपीए उद्धरण

Schefler, W. C. (1976). Biology; principles and issues. Addison-Wesley.

शिकागो स्टाइल उद्धरण

Schefler, Wiliam C. Biology; Principles and Issues. Addison-Wesley, 1976.

एमएलए उद्धरण

Schefler, Wiliam C. Biology; Principles and Issues. Addison-Wesley, 1976.