Cita APA

Land, H. C. 1. (1970). Birds of Guatemala. Wynnewood Penns: International Committee for Bird Preservation Pan-American Section.

Citación estilo Chicago

Land, Hugh C. 1929-1968. Birds of Guatemala. Wynnewood Penns: International Committee for Bird Preservation Pan-American Section, 1970.

Cita MLA

Land, Hugh C. 1929-1968. Birds of Guatemala. Wynnewood Penns: International Committee for Bird Preservation Pan-American Section, 1970.