Cita APA

Verrill, H. H., & Verrill, H. H. (1938). Old civilizations of the New World. New York, New York.

Citación estilo Chicago

Verrill, Hyatt H., y Hyatt H. Verrill. Old Civilizations of the New World. New York, New York, 1938.

Cita MLA

Verrill, Hyatt H., y Hyatt H. Verrill. Old Civilizations of the New World. New York, New York, 1938.