APA (7th ed.) Citation

Rogers, R. M., & Watkins, A. R. j. a. (1981). German through conversational patterns (3rd ed.). Harper % Row.

Chicago Style (17th ed.) Citation

Rogers, R. Max, and Arthur R. joint author Watkins. German Through Conversational Patterns. 3rd ed. New York: Harper % Row, 1981.

MLA (9th ed.) Citation

Rogers, R. Max, and Arthur R. joint author Watkins. German Through Conversational Patterns. 3rd ed. Harper % Row, 1981.