Cita APA (7a ed.)

Coles, M., & Lord, B. E. (1978). Open road: Access to English (1st ed., 13th imp.). Oxford University Press.

Cita Chicago Style (17a ed.)

Coles, Michael, y Basil Edwards Lord. Open Road: Access to English. 1st ed., 13th imp. Oxford [etc.]: Oxford University Press, 1978.

Cita MLA (9a ed.)

Coles, Michael, y Basil Edwards Lord. Open Road: Access to English. 1st ed., 13th imp. Oxford University Press, 1978.