APA (7th ed.) Citation

Hughes, J. (2013). Life: Pre-Intermediate. Workbook (1a. ed.). National Geographic Learning.

Chicago Style (17th ed.) Citation

Hughes, John. Life: Pre-Intermediate. Workbook. 1a. ed. Hampshire: National Geographic Learning, 2013.

MLA (9th ed.) Citation

Hughes, John. Life: Pre-Intermediate. Workbook. 1a. ed. National Geographic Learning, 2013.