APA-čujuhus (7. p.)
Loukotka, Č., & Wilbert, J. (1968). Classification of South American Indian Languages. Latin American Center, University of California, Los Angeles.
Chicago-čujuhus (17. p.)
Loukotka, Čestmír, juo Johannes Wilbert. Classification of South American Indian Languages. Los Angeles, California: Latin American Center, University of California, Los Angeles, 1968.
MLA-čujuhus (9. p.)
Loukotka, Čestmír, juo Johannes Wilbert. Classification of South American Indian Languages. Latin American Center, University of California, Los Angeles, 1968.
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