Cita APA

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

Citación estilo Chicago

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

Cita MLA

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