Cita APA (7th ed.)

Eckersley, C. E. (1955). A modern english course for foreign students. Longmans, Green.

Cita Chicago (17th ed.)

Eckersley, C. E. A Modern English Course for Foreign Students. Londres, Inglaterra: Longmans, Green, 1955.

Cita MLA (9th ed.)

Eckersley, C. E. A Modern English Course for Foreign Students. Longmans, Green, 1955.