Cita APA (7a ed.)

Eckersley, C. E., & Walford, P. J. (1961). A modern English course for foreign students: An intermediate book (Reprint.). Longmans.

Cita Chicago Style (17a ed.)

Eckersley, C. E., y P. J. Walford. A Modern English Course for Foreign Students: An Intermediate Book. Reprint. London [etc.]: Longmans, 1961.

Cita MLA (9a ed.)

Eckersley, C. E., y P. J. Walford. A Modern English Course for Foreign Students: An Intermediate Book. Reprint. Longmans, 1961.