APA (7e ed.) Bronvermelding
Helmstetter, G. (1997). Increasing hits and selling more on your Web site. Wiley Computer Pub..
Chicago (17e ed.) Bronvermelding
Helmstetter, Greg. Increasing Hits and Selling More on Your Web Site. New York: Wiley Computer Pub., 1997.
MLA (9e ed.) Bronvermelding
Helmstetter, Greg. Increasing Hits and Selling More on Your Web Site. Wiley Computer Pub., 1997.
Let op: Deze citaties zijn niet altijd 100% accuraat.