Sayer, M., Dellar, H., & Walkley, A. (2016). Outcomes. Upper Intermediate: Teacher's Book Class Audio (segunda edición.). National Geographic Learning.
Čikaški stil citiranja (17. izdanje)Sayer, Mike, Hugh Dellar, i Andrew Walkley. Outcomes. Upper Intermediate: Teacher's Book Class Audio. segunda edición. Hampshire: National Geographic Learning, 2016.
MLA način citiranja (9. izdanje)Sayer, Mike, et al. Outcomes. Upper Intermediate: Teacher's Book Class Audio. segunda edición. National Geographic Learning, 2016.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.