Gaya APA

Heyworth, R, M. (2008). New Science Discovery For Lower Secondary 2nd edition: Theory Workbook 1 Teacher's Edition . Singapore: Pearson Education.

Gaya MLA

Heyworth, Rex, M. "New Science Discovery For Lower Secondary 2nd edition: Theory Workbook 1 Teacher's Edition". Singapore: Pearson Education, 2008. Text.