APA (7th ed.) Citation

Eckersley, C. E. (1938). Essential English: [a progressive course] for foreign students. Longmans, Green and Co..

Chicago Style (17th ed.) Citation

Eckersley, C. E. Essential English: [a Progressive Course] for Foreign Students. London, New York: Longmans, Green and Co., 1938.

MLA (8th ed.) Citation

Eckersley, C. E. Essential English: [a Progressive Course] for Foreign Students. Longmans, Green and Co., 1938.