Cita APA (7th ed.)

Yeates, E., Millin, S., Harrison, M., Ball, R., & Watkins, F. (2016). Keynote: Upper Intermediate. Workbook (1a. ed.). National Geographic Learning.

Cita Chicago (17th ed.)

Yeates, Eunice, Sandy Millin, Mike Harrison, Rhiannon Ball, i Fran Watkins. Keynote: Upper Intermediate. Workbook. 1a. ed. Hampshire: National Geographic Learning, 2016.

Cita MLA (9th ed.)

Yeates, Eunice, et al. Keynote: Upper Intermediate. Workbook. 1a. ed. National Geographic Learning, 2016.