Cita APA (7th ed.)

Lansford, L. (2016). Keynote: Intermediate. Workbook (1a. ed.). National Geographic Learning.

Cita Chicago (17th ed.)

Lansford, Lewis. Keynote: Intermediate. Workbook. 1a. ed. Hampshire: National Geographic Learning, 2016.

Cita MLA (9th ed.)

Lansford, Lewis. Keynote: Intermediate. Workbook. 1a. ed. National Geographic Learning, 2016.