Gaya APA

Curtis, C. et al (2018). Chemistry Pearson Edexcel International AS / A Level (Student Book 1) . London, United ingdom: Pearson Education Limited,80 Strand, london, W2RoR.

Gaya MLA

Curtis, Cliff. et al. "Chemistry Pearson Edexcel International AS / A Level (Student Book 1)". London, United ingdom: Pearson Education Limited,80 Strand, london, W2RoR, 2018. Text.