APA

Parsons R., Shepperson A., . (2003). GCSE Chemistry. Cumbria, England: Coordination Group Publications.

Chicago

Parsons Richard, Shepperson Alice, . 2003. GCSE Chemistry. Cumbria, England: Coordination Group Publications.

Harvard

Parsons R., Shepperson A., . (2003). GCSE Chemistry. Cumbria, England: Coordination Group Publications.

MLA

Parsons Richard, Shepperson Alice, . GCSE Chemistry. Cumbria, England: Coordination Group Publications. 2003.