Cita APA

Walker, E., & Elsworth, S. (1994). Grammar practice for intermediate students: With answer key. Burnt Mill: Longman.

Chicago Style Citation

Walker, E., i S. Elsworth. Grammar Practice for Intermediate Students: With Answer Key. Burnt Mill: Longman, 1994.

Cita MLA

Walker, E., i S. Elsworth. Grammar Practice for Intermediate Students: With Answer Key. Burnt Mill: Longman, 1994.

Atenció: Aquestes cites poden no estar 100% correctes.