Cita APA (7a ed.)

Alexander, L. (1971). New concept english: Developing skills : recorded drills : tapescript. Longman.

Cita Chicago Style (17a ed.)

Alexander, L.G. New Concept English: Developing Skills : Recorded Drills : Tapescript. London: Longman, 1971.

Cita MLA (9a ed.)

Alexander, L.G. New Concept English: Developing Skills : Recorded Drills : Tapescript. Longman, 1971.