APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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