Cita APA (7a ed.)

Loukotka, C., & Wilbert, J. (1968). Classification of South American Indian languages. Latin American Center, University of California.

Cita Chicago Style (17a ed.)

Loukotka, Cestmír, y Johannes Wilbert. Classification of South American Indian Languages. Los Angeles: Latin American Center, University of California, 1968.

Cita MLA (9a ed.)

Loukotka, Cestmír, y Johannes Wilbert. Classification of South American Indian Languages. Latin American Center, University of California, 1968.