Irwin, R. (1985). Wealth builders: Six get rich quick strategies that really work. Franklin Watts.
Citace podle Chicago (17th ed.)Irwin, Robert. Wealth Builders: Six Get Rich Quick Strategies That Really Work. New York: Franklin Watts, 1985.
Citace podle MLA (9th ed.)Irwin, Robert. Wealth Builders: Six Get Rich Quick Strategies That Really Work. Franklin Watts, 1985.
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