Corder, S. (1971). An intermediate english practice book: Key to the exercises. Longman.
Citación estilo ChicagoCorder, S.Pit. An Intermediate English Practice Book: Key to the Exercises. London: Longman, 1971.
Cita MLACorder, S.Pit. An Intermediate English Practice Book: Key to the Exercises. Longman, 1971.
Warning: These citations may not always be 100% accurate.