Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.