Gaya APA

Mrozowska, C, R, A, S, H., Johnston, O. (2006). New Opportunities Education For Life Elementary : Language Powerbook . England: Pearson Education Limited.

Gaya MLA

Mrozowska, Christina, Ruse,, Anna, Sikorzynska,, Hanna., Johnston, Olivia. "New Opportunities Education For Life Elementary : Language Powerbook". England: Pearson Education Limited, 2006. Text.