APA (7th ed.) Citation

Day, C. (1920). A history of commerce (New impression.). Longmans, Green, and Co.

Chicago Style (17th ed.) Citation

Day, Clive. A History of Commerce. New impression. New York [etc.]: Longmans, Green, and Co, 1920.

MLA (9th ed.) Citation

Day, Clive. A History of Commerce. New impression. Longmans, Green, and Co, 1920.