International Committee for Bird Preservation. Pan American Section. (1957). Research report. The Section.
Chicago-referens (17:e uppl.)International Committee for Bird Preservation. Pan American Section. Research Report. New York, N.Y.: The Section, 1957.
MLA-referens (8:e uppl.)International Committee for Bird Preservation. Pan American Section. Research Report. The Section, 1957.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.