APA Style

Harris, M. et al (2014). New challenges: Students' Book 2 (cet. 8). New York: Pearson Longman Asia ELT.

MLA Style

Harris, Michael. et al. "New challenges: Students' Book 2". cet. 8 New York: Pearson Longman Asia ELT, 2014. Buku SMP Athalia.