APA (7th ed.) Citation

Robins, R. H., & Uhlenbeck, E. M. (1991). Endangered languages. by St. Martin's Press.

Chicago Style (17th ed.) Citation

Robins, R. H., and E. M. Uhlenbeck. Endangered Languages. Oxford [etc.]: by St. Martin's Press, 1991.

MLA (9th ed.) Citation

Robins, R. H., and E. M. Uhlenbeck. Endangered Languages. by St. Martin's Press, 1991.

Warning: These citations may not always be 100% accurate.