(1998). Web developer.com guide to search engines / Wes Sonnenreich, Tim Macinta.
Cita Chicago (17th ed.)Web Developer.com Guide to Search Engines / Wes Sonnenreich, Tim Macinta. 1998.
Cita MLA (9th ed.)Web Developer.com Guide to Search Engines / Wes Sonnenreich, Tim Macinta. 1998.
Atenció: Aquestes cites poden no estar 100% correctes.