Cita APA (7th ed.)

Eckersley, C. (1964). A commercial course for foreign students™. Longman.

Cita Chicago (17th ed.)

Eckersley, C.E. A Commercial Course for Foreign Students™. London: Longman, 1964.

Cita MLA (9th ed.)

Eckersley, C.E. A Commercial Course for Foreign Students™. Longman, 1964.