Cita APA (7a ed.)

Schrenk, M. (2007). Webbots, spiders, and screen scrapers: A guide to developing Internet agents with PHP/CURL (1st edition.). No Starch Press.

Cita Chicago Style (17a ed.)

Schrenk, Michael. Webbots, Spiders, and Screen Scrapers: A Guide to Developing Internet Agents with PHP/CURL. 1st edition. San Francisco: No Starch Press, 2007.

Cita MLA (9a ed.)

Schrenk, Michael. Webbots, Spiders, and Screen Scrapers: A Guide to Developing Internet Agents with PHP/CURL. 1st edition. No Starch Press, 2007.