Gaya APA

Hawes, A., Tyger, R. (2009). Pearson Baccalaureate PYP Readers : Elephant Walk . Essex: Pearson Education Ltd..

Gaya MLA

Hawes, Alison., Tyger, Rory. "Pearson Baccalaureate PYP Readers : Elephant Walk". Essex: Pearson Education Ltd., 2009. Text.