Cita APA (7a ed.)

Harmer, J., & Rossner, R. (1991). More than words: Vocabulary for upper intermediate to advanced students. Longman.

Cita Chicago Style (17a ed.)

Harmer, Jeremy, y Richard Rossner. More than Words: Vocabulary for Upper Intermediate to Advanced Students. Essex: Longman, 1991.

Cita MLA (8a ed.)

Harmer, Jeremy, y Richard Rossner. More than Words: Vocabulary for Upper Intermediate to Advanced Students. Longman, 1991.