1. WAGE PAYMENT METHODS OF THE FUTURE
2. Patton Arch, Men, Money, and Motivation (New York: McGraw-Hill Book Co., Inc., 1961), p. 34.
3. A study of perceived need satisfactions in bottom and middle management jobs.
4. Brown Wilfred, Piecework Abandoned (London: Heineman and Co. Ltd., 1962), p. 15.