Gaya APA

dkk, D, C, C. (1995). Biology Matters G.C.E 'O' Level (Workbook Volume 1) . Singapore: Marshall Cavendish Education.

Gaya MLA

dkk, Dr, Charles, Chew,. "Biology Matters G.C.E 'O' Level (Workbook Volume 1)". Singapore: Marshall Cavendish Education, 1995. Text.