Helmstetter, G. (1997). Increasing hits and selling more on your Web site. Wiley Computer Pub..
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Citação norma Chicago
Helmstetter, Greg. Increasing Hits and Selling More on Your Web Site. New York: Wiley Computer Pub., 1997.
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Citação norma MLA
Helmstetter, Greg. Increasing Hits and Selling More on Your Web Site. Wiley Computer Pub., 1997.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.