APA (7th ed.) Citation

Comrie, B., & Schachter, P. (1987). The World's major languages. Croom Helm.

Chicago Style (17th ed.) Citation

Comrie, Bernard, and Paul Schachter. The World's Major Languages. London: Croom Helm, 1987.

MLA (9th ed.) Citation

Comrie, Bernard, and Paul Schachter. The World's Major Languages. Croom Helm, 1987.