APA (7th ed.) Citation

MACKIN, R., & SEIDL, J. (1979). Exercises in english patterns and usage.-- Ed. 2. Oxford University Press.

Chicago Style (17th ed.) Citation

MACKIN, Ronald, and Jennifer SEIDL. Exercises in English Patterns and Usage.-- Ed. 2. Oxford: Oxford University Press, 1979.

MLA (9th ed.) Citation

MACKIN, Ronald, and Jennifer SEIDL. Exercises in English Patterns and Usage.-- Ed. 2. Oxford University Press, 1979.