Gaya APA

Kwan, L, P., Lam, E, Y, K. (2013). Biology Matters : GCE 'O' Level (Cet.2). Singapore: Marshall Cavendish Education.

Gaya MLA

Kwan, Lam, Peng., Lam, Eric, Y, K. "Biology Matters : GCE 'O' Level". Cet.2 Singapore: Marshall Cavendish Education, 2013. Text.