Cita APA

Mackin, R., & Seild, J. (1980). Exercices in english patterns and usage (2a. ed.). Oxford: Oxford University Press.

Citación estilo Chicago

Mackin, Ronald, and Jennifer Seild. Exercices in English Patterns and Usage. 2a. ed. Oxford: Oxford University Press, 1980.

Cita MLA

Mackin, Ronald, and Jennifer Seild. Exercices in English Patterns and Usage. 2a. ed. Oxford: Oxford University Press, 1980.