Gaya APA

Harris, M., Sikorzynska, D, M, A. (2001). New Opportunities Education For Life Elementary : Students' Book (Edisi 2, Cet. 1). England: Pearson Education Limited.

Gaya MLA

Harris, Michael., Sikorzynska, David, Mower,, Anna. "New Opportunities Education For Life Elementary : Students' Book". Edisi 2, Cet. 1 England: Pearson Education Limited, 2001. Text.