APA (7th ed.) Citation

Key, M. R. (1979). The grouping of South American Indian languages. Narr.

Chicago Style (17th ed.) Citation

Key, Mary Ritchie. The Grouping of South American Indian Languages. Tubingen, Germany: Narr, 1979.

MLA (9th ed.) Citation

Key, Mary Ritchie. The Grouping of South American Indian Languages. Narr, 1979.