Cita APA (7a ed.)

Wetz, B., & Pye, D. (2011). English plus: Student's book 4 (1a. ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Wetz, Ben, y Diana Pye. English Plus: Student's Book 4. 1a. ed. Oxford: Oxford University Press, 2011.

Cita MLA (9a ed.)

Wetz, Ben, y Diana Pye. English Plus: Student's Book 4. 1a. ed. Oxford University Press, 2011.