Cita APA (7a ed.)

Eckersley, C. E., & Eckersley, J. (1960). A comprehensive english grammar for foreign students. Longmans.

Cita Chicago Style (17a ed.)

Eckersley, C. E., y J.M Eckersley. A Comprehensive English Grammar for Foreign Students. London: Longmans, 1960.

Cita MLA (9a ed.)

Eckersley, C. E., y J.M Eckersley. A Comprehensive English Grammar for Foreign Students. Longmans, 1960.