APA aipamena

Earl , B., & Wilford L . D . R. (1998). Revision for chemistry GCSE with answers. John murray publishers.

Chicago Style aipamena

Earl , B., and Wilford L . D . R. Revision for Chemistry GCSE with Answers. London: John murray publishers, 1998.

MLA aipamena

Earl , B., and Wilford L . D . R. Revision for Chemistry GCSE with Answers. John murray publishers, 1998.