APA Style

Ling, W, M., Ling, T, A. (2006). Biology Expression an Inquiry Approach : Theory Workbook O Level Special Express . Singapore: EPB Pan Pacific.

MLA Style

Ling, Woo, Mei., Ling, Tan, Aik. "Biology Expression an Inquiry Approach : Theory Workbook O Level Special Express". Singapore: EPB Pan Pacific, 2006. Text.