APA (7th ed.) Citation

Crystal, D., & Varley, R. (1993). Introduction to language pathology (3rd ed.). Whurr Publishers.

Chicago Style (17th ed.) Citation

Crystal, David, and Rosemary Varley. Introduction to Language Pathology. 3rd ed. London: Whurr Publishers, 1993.

MLA (8th ed.) Citation

Crystal, David, and Rosemary Varley. Introduction to Language Pathology. 3rd ed. Whurr Publishers, 1993.