Gray, J. S. (1956). Common sense in business: A digest of management procedures. New York: McGraw-Hill Book Company.
Παραπομπή Chicago StyleGray, James Seton. Common Sense in Business: A Digest of Management Procedures. New York: McGraw-Hill Book Company, 1956.
Παραπομπή MLAGray, James Seton. Common Sense in Business: A Digest of Management Procedures. New York: McGraw-Hill Book Company, 1956.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.