Cita APA (7a ed.)

Eckersley, C. E., & Kaufmann, W. (1951). A commercial course for foreign students (2nd ed.). Longmans.

Cita Chicago Style (17a ed.)

Eckersley, C. E., y Walter Kaufmann. A Commercial Course for Foreign Students. 2nd ed. London: Longmans, 1951.

Cita MLA (9a ed.)

Eckersley, C. E., y Walter Kaufmann. A Commercial Course for Foreign Students. 2nd ed. Longmans, 1951.