APA (7th ed.) Citation

Moulton, H. G., & Lewis, C. (1925). The french debt problem. MacMillan.

Chicago Style (17th ed.) Citation

Moulton, Harold G., and Cleona Lewis. The French Debt Problem. New York [etc.]: MacMillan, 1925.

MLA (9th ed.) Citation

Moulton, Harold G., and Cleona Lewis. The French Debt Problem. MacMillan, 1925.