Cita APA

Swanton, J. R., & Swanton, J. R. (1948). The primary centers of civilization. Washington, D.C.: Smithsonian Institution.

Citación estilo Chicago

Swanton, John Reed, y John Reed Swanton. The Primary Centers of Civilization. Washington, D.C.: Smithsonian Institution, 1948.

Cita MLA

Swanton, John Reed, y John Reed Swanton. The Primary Centers of Civilization. Washington, D.C.: Smithsonian Institution, 1948.