Cita APA (7th ed.)

Lansford, L., Dummett, P., & Stephenson, H. (2016). Keynote: Advanced. Student's Book (1a. ed.). National Geographic Learning.

Cita Chicago (17th ed.)

Lansford, Lewis, Paul Dummett, i Helen Stephenson. Keynote: Advanced. Student's Book. 1a. ed. Hampshire: National Geographic Learning, 2016.

Cita MLA (9th ed.)

Lansford, Lewis, et al. Keynote: Advanced. Student's Book. 1a. ed. National Geographic Learning, 2016.