Cita APA (7a ed.)

Viney, P., & Viney, K. (1990). Teacher's book 1. University.

Cita Chicago Style (17a ed.)

Viney, Peter, y Karen Viney. Teacher's Book 1. Oxford: University, 1990.

Cita MLA (8a ed.)

Viney, Peter, y Karen Viney. Teacher's Book 1. University, 1990.