Gaya APA

Mayer, C., Leake, D. (2009). Pearson Baccalaureate PYP Readers : Rivers and Streams . Essex: Pearson Education Ltd..

Gaya MLA

Mayer, Cassie., Leake, Diyan. "Pearson Baccalaureate PYP Readers : Rivers and Streams". Essex: Pearson Education Ltd., 2009. Text.