Παραπομπή σε μορφή APA (7η εκδ.)

Sayer, M., Dellar, H., & Walkley, A. (2016). Outcome: Intermediate Teacher's Book. National Geographic Learning Cengage Learning.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sayer, Mike, Hugh Dellar, και Andrew Walkley. Outcome: Intermediate Teacher's Book. United Kingdom: National Geographic Learning Cengage Learning, 2016.

Παραπομπή σε μορφή MLA (9th εκδ.)

Sayer, Mike, et al. Outcome: Intermediate Teacher's Book. National Geographic Learning Cengage Learning, 2016.