Cita APA

Voegelin, C. F. 1., & Voegelin, F. M. 1. (1978). Classification and index of the world's languages (2nd printing.). New York [etc.]: Elsevier.

Citación estilo Chicago

Voegelin, Charles F. 1906-1986, and Florence M. 1927-1989 Voegelin. Classification and Index of the World's Languages. 2nd printing. New York [etc.]: Elsevier, 1978.

Cita MLA

Voegelin, Charles F. 1906-1986, and Florence M. 1927-1989 Voegelin. Classification and Index of the World's Languages. 2nd printing. New York [etc.]: Elsevier, 1978.