Babson, R. W. (1933). Fighting business depressions: How to overcome operating losses in your business. Harper & Brothers.
Citazione stile Chigago Style (17a edizione)Babson, Roger W. Fighting Business Depressions: How to Overcome Operating Losses in Your Business. New York: Harper & Brothers, 1933.
Citatione MLA (9a ed.)Babson, Roger W. Fighting Business Depressions: How to Overcome Operating Losses in Your Business. Harper & Brothers, 1933.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.