Cita APA (7a ed.)
Haartman, L. v. (1958). Population Changes in the tufted duck, Aythya fuligula (L.).
Cita Chicago Style (17a ed.)
Haartman, Lars von. Population Changes in the Tufted Duck, Aythya Fuligula (L.). 1958.
Cita MLA (9a ed.)
Haartman, Lars von. Population Changes in the Tufted Duck, Aythya Fuligula (L.). 1958.
Precaución: Estas citas no son 100% exactas.