APA

Hilty S. L., Brown W. L., .Range extensions of Colombian birds as indicated by the M. A. Carrker Jr. Collection at the National Museum of Natural Hystory, Smithsonian Institution. : .

Chicago

Hilty Steven L, Brown William L, .Range extensions of Colombian birds as indicated by the M. A. Carrker Jr. Collection at the National Museum of Natural Hystory, Smithsonian Institution. : .

Harvard

Hilty S. L., Brown W. L., .Range extensions of Colombian birds as indicated by the M. A. Carrker Jr. Collection at the National Museum of Natural Hystory, Smithsonian Institution. : .

MLA

Hilty Steven L, Brown William L, .: . .