Cita APA (7a ed.)

Eckersley, C. E. A modern english course for foreign students: A intermediate Book. Longmans Green.

Cita Chicago Style (17a ed.)

Eckersley, C. E. A Modern English Course for Foreign Students: A Intermediate Book. London: Longmans Green.

Cita MLA (9a ed.)

Eckersley, C. E. A Modern English Course for Foreign Students: A Intermediate Book. Longmans Green.