APA (7th ed.) Citation

University of York Science Education Group. (2006). Twenty First Century Science: GCSE Science Higher Level Textbook. Oxford university press.

Chicago Style (17th ed.) Citation

University of York Science Education Group. Twenty First Century Science: GCSE Science Higher Level Textbook. New york: Oxford university press, 2006.

MLA (9th ed.) Citation

University of York Science Education Group. Twenty First Century Science: GCSE Science Higher Level Textbook. Oxford university press, 2006.