APA (7th ed.) Citation

Coughlin, C. E., & Shipstead, H. (1939). Unpayable debts. The Author.

Chicago Style (17th ed.) Citation

Coughlin, Charles E., and Henrik Shipstead. Unpayable Debts. Royal Oak, Mich.: The Author, 1939.

MLA (8th ed.) Citation

Coughlin, Charles E., and Henrik Shipstead. Unpayable Debts. The Author, 1939.