Cita APA (7a ed.)

Alexander, L. (1995). Longman english grammar practice: For intermediate students.

Cita Chicago Style (17a ed.)

Alexander, L.G. Longman English Grammar Practice: For Intermediate Students. Harlow, 1995.

Cita MLA (9a ed.)

Alexander, L.G. Longman English Grammar Practice: For Intermediate Students. 1995.