Cita APA (7a ed.)

Eckersley, C. E., & Kaufmann, W. (1964). A commercial course for foreign students. Longmans.

Cita Chicago Style (17a ed.)

Eckersley, C. E., y Walter Kaufmann. A Commercial Course for Foreign Students. London: Longmans, 1964.

Cita MLA (9a ed.)

Eckersley, C. E., y Walter Kaufmann. A Commercial Course for Foreign Students. Longmans, 1964.