Cita APA

Johannsen, K. L., Traver Chase, R., & Jenkins, R. (2010). World English 2. (2 edition.). Boston, Estados Unidos Canada: National Geographic Learning Cengage Learning.

Citación estilo Chicago

Johannsen, Kristin L., Rebecca Traver Chase, y Rob Jenkins. World English 2. 2 edition. Boston, Estados Unidos Canada: National Geographic Learning Cengage Learning, 2010.

Cita MLA

Johannsen, Kristin L., Rebecca Traver Chase, y Rob Jenkins. World English 2. 2 edition. Boston, Estados Unidos Canada: National Geographic Learning Cengage Learning, 2010.