APA (7th ed.) Citation
Grimes, B. F. (1988). Ethnologue index (11th ed.). Summer Institute of linguistics.
Chicago Style (17th ed.) Citation
Grimes, Barbara F. Ethnologue Index. 11th ed. Dallas, Tex.: Summer Institute of linguistics, 1988.
MLA (9th ed.) Citation
Grimes, Barbara F. Ethnologue Index. 11th ed. Summer Institute of linguistics, 1988.
Warning: These citations may not always be 100% accurate.