Cita APA (7th ed.)

Williams, G. (2002). Biology for you: Revised national curriculum edition for GCSE ([2nd ed.].). Nelson Thornes.

Cita Chicago (17th ed.)

Williams, Gareth. Biology for You: Revised National Curriculum Edition for GCSE. [2nd ed.]. Cheltenham, U.K: Nelson Thornes, 2002.

Cita MLA (9th ed.)

Williams, Gareth. Biology for You: Revised National Curriculum Edition for GCSE. [2nd ed.]. Nelson Thornes, 2002.