Cita APA (7th ed.)

Alexander, L. G. (1993). Longman advanced grammar: Reference and practice. Longman.

Cita Chicago (17th ed.)

Alexander, Louis George. Longman Advanced Grammar: Reference and Practice. Essex: Longman, 1993.

Cita MLA (9th ed.)

Alexander, Louis George. Longman Advanced Grammar: Reference and Practice. Longman, 1993.