Gaya APA

Heyworth, R, M. (2008). Science Discovery for Lower Secondary: Theory Workbook . Singapore: Pearson Longman (Pearson Education South Asia Pte Ltd).

Gaya MLA

Heyworth, Rex, M.. "Science Discovery for Lower Secondary: Theory Workbook". Singapore: Pearson Longman (Pearson Education South Asia Pte Ltd), 2008. Text.