APA (7th ed.) Citation

Trombley, G., Bullen, R., Kim, J., & Ham, M. (2014). Korean from zero!: Proven methods to learn Korean with integrated workbook. From zero!.

Chicago Style (17th ed.) Citation

Trombley, George, Reed Bullen, Jiyoon Kim, and Myunghee Ham. Korean from Zero!: Proven Methods to Learn Korean with Integrated Workbook. From zero!, 2014.

MLA (9th ed.) Citation

Trombley, George, et al. Korean from Zero!: Proven Methods to Learn Korean with Integrated Workbook. From zero!, 2014.