Cita APA (7a ed.)

Mackin, R. (1973). Exercises in english patterns and usage. Oxford University.

Cita Chicago Style (17a ed.)

Mackin, Ronald. Exercises in English Patterns and Usage. London: Oxford University, 1973.

Cita MLA (8a ed.)

Mackin, Ronald. Exercises in English Patterns and Usage. Oxford University, 1973.