APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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