APA Citation

CALLAGHAN, & Jenkins. (1999). GCSE questions and answers biology. London: Letts Educational.

Chicago Style Citation

CALLAGHAN, and Jenkins. GCSE Questions and Answers Biology. London: Letts Educational, 1999.

MLA Citation

CALLAGHAN, and Jenkins. GCSE Questions and Answers Biology. London: Letts Educational, 1999.

Warning: These citations may not always be 100% accurate.