Cita APA (7a ed.)

Hill, D. A. (2013). Life: Pre-Intermediate. Teacher's Book (1a. ed.). National Geographic Learning.

Cita Chicago Style (17a ed.)

Hill, David A. Life: Pre-Intermediate. Teacher's Book. 1a. ed. Hampshire: National Geographic Learning, 2013.

Cita MLA (9a ed.)

Hill, David A. Life: Pre-Intermediate. Teacher's Book. 1a. ed. National Geographic Learning, 2013.