Zabel, W. D. (1995). The rich die richer and you can too. John Wiley & Sons.
Chicago-čujuhus (17. p.)Zabel, William D. The Rich Die Richer and You Can Too. New York: John Wiley & Sons, 1995.
MLA-čujuhus (9. p.)Zabel, William D. The Rich Die Richer and You Can Too. John Wiley & Sons, 1995.
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