Cita APA (7a ed.)

Foley, M., & Hall, D. (1993). Distinction: English for advanced learners. Nelson.

Cita Chicago Style (17a ed.)

Foley, Mark, y Diane Hall. Distinction: English for Advanced Learners. Edinburgh: Nelson, 1993.

Cita MLA (9a ed.)

Foley, Mark, y Diane Hall. Distinction: English for Advanced Learners. Nelson, 1993.