एपीए उद्धरण

Sylvester-Bradley, P. C. (1956). Species concept in palaeontology ([1st ed.].).

शिकागो स्टाइल उद्धरण

Sylvester-Bradley, P. C. Species Concept in Palaeontology. [1st ed.]. London, 1956.

एमएलए उद्धरण

Sylvester-Bradley, P. C. Species Concept in Palaeontology. [1st ed.]. 1956.