APA (7th ed.) Citation

Ruhlen, M. (1987). A guide to world's languages. Stanford University Press.

Chicago Style (17th ed.) Citation

Ruhlen, Merritt. A Guide to World's Languages. Stanford, Calif: Stanford University Press, 1987.

MLA (9th ed.) Citation

Ruhlen, Merritt. A Guide to World's Languages. Stanford University Press, 1987.