Cita APA (7th ed.)
Bird, W. (1991). The orgin of species revisited: The theories of evolution and of abrupt appearance. Regency.
Cita Chicago (17th ed.)
Bird, W.R. The Orgin of Species Revisited: The Theories of Evolution and of Abrupt Appearance. Tennessee: Regency, 1991.
Cita MLA (9th ed.)
Bird, W.R. The Orgin of Species Revisited: The Theories of Evolution and of Abrupt Appearance. Regency, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.