Παραπομπή APA

Swan, M., & Walter, C. (2012). Oxford English grammar course: Basic : a grammar practice book for elementary to pre-intermediate students of English with answers. Oxford University Press.

Παραπομπή Chicago Style

Swan, Michael, και Catherine Walter. Oxford English Grammar Course: Basic : A Grammar Practice Book for Elementary to Pre-intermediate Students of English with Answers. New Delhi: Oxford University Press, 2012.

Παραπομπή MLA

Swan, Michael, και Catherine Walter. Oxford English Grammar Course: Basic : A Grammar Practice Book for Elementary to Pre-intermediate Students of English with Answers. Oxford University Press, 2012.