Cita APA (7a ed.)

Hewings, A., & Hewings, M. (2006). Grammar and context: An advanced resource book. Routledge.

Cita Chicago Style (17a ed.)

Hewings, Ann, y Martin Hewings. Grammar and Context: An Advanced Resource Book. London ; New York: Routledge, 2006.

Cita MLA (9a ed.)

Hewings, Ann, y Martin Hewings. Grammar and Context: An Advanced Resource Book. Routledge, 2006.