APA (7th ed.) Citation

Matthews, R. J., & Demopoulos, W. (1989). Learnability and linguistic theory. Kluwer Academic.

Chicago Style (17th ed.) Citation

Matthews, Robert J., and William Demopoulos. Learnability and Linguistic Theory. Dordrecht [etc.]: Kluwer Academic, 1989.

MLA (9th ed.) Citation

Matthews, Robert J., and William Demopoulos. Learnability and Linguistic Theory. Kluwer Academic, 1989.