Gaya APA

Wai, L, K. (2007). Science In Focus Physics 'O' Level. 2nd Edition Practical WorkBook . Singapore: Pearson Education South Asia Pte Ltd.

Gaya MLA

Wai, Loo, Kwok. "Science In Focus Physics 'O' Level. 2nd Edition Practical WorkBook". Singapore: Pearson Education South Asia Pte Ltd, 2007. Text.