APA (7th ed.) Citation

Swan, M., & Walter, C. The Cambridge english course. Practice Book 1 (20a ed.).

Chicago Style (17th ed.) Citation

Swan, Michael, and Catherine Walter. The Cambridge English Course. Practice Book 1. 20a ed.

MLA (8th ed.) Citation

Swan, Michael, and Catherine Walter. The Cambridge English Course. Practice Book 1. 20a ed.

Warning: These citations may not always be 100% accurate.