Cita APA (7a ed.)

Roe, P., & Richards, K. (1994). Distance learning in ELT. Modern English Publications.

Cita Chicago Style (17a ed.)

Roe, Peter, y Keith Richards. Distance Learning in ELT. London: Modern English Publications, 1994.

Cita MLA (9a ed.)

Roe, Peter, y Keith Richards. Distance Learning in ELT. Modern English Publications, 1994.