Cita APA (7th ed.)
Holgersen, H. (1956). On a Collection of birds from n'Zerekore, French Guinea.
Cita Chicago (17th ed.)
Holgersen, Holger. On a Collection of Birds from N'Zerekore, French Guinea. 1956.
Cita MLA (9th ed.)
Holgersen, Holger. On a Collection of Birds from N'Zerekore, French Guinea. 1956.
Atenció: Aquestes cites poden no estar 100% correctes.