Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.