APA Style

Wong-Heng, S, S. (1999). Environment and People Secondary One: Physical and Human Lanscapes: Workbook 1B . New York :: The Educational Pub. House.

MLA Style

Wong-Heng, San, San,. "Environment and People Secondary One: Physical and Human Lanscapes: Workbook 1B". New York :: The Educational Pub. House, 1999. Text.