Babson, R. W. (1933). Fighting business depressions: How to overcome operating losses in your business. Harper & Brothers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Babson, Roger W. Fighting Business Depressions: How to Overcome Operating Losses in Your Business. New York: Harper & Brothers, 1933.
Παραπομπή σε μορφή MLA (9th εκδ.)Babson, Roger W. Fighting Business Depressions: How to Overcome Operating Losses in Your Business. Harper & Brothers, 1933.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.