APA (7th ed.) Citation

Bybee, J. L., & Perkins, R. D. (1994). The evolution of grammar: Tense, aspect, and modality in the languages of the world. University of Chicago Press.

Chicago Style (17th ed.) Citation

Bybee, Joan L., and Revere Dale Perkins. The Evolution of Grammar: Tense, Aspect, and Modality in the Languages of the World. Chicago: University of Chicago Press, 1994.

MLA (9th ed.) Citation

Bybee, Joan L., and Revere Dale Perkins. The Evolution of Grammar: Tense, Aspect, and Modality in the Languages of the World. University of Chicago Press, 1994.