Cita APA (7th ed.)
Schrenk, M. (2012). Webbots, spiders, and screen scrapers: A guide to developing Internet agents with PHP/CURL (2nd ed.). No Starch Press.
Cita Chicago (17th ed.)
Schrenk, Michael. Webbots, Spiders, and Screen Scrapers: A Guide to Developing Internet Agents with PHP/CURL. 2nd ed. San Francisco: No Starch Press, 2012.
Cita MLA (9th ed.)
Schrenk, Michael. Webbots, Spiders, and Screen Scrapers: A Guide to Developing Internet Agents with PHP/CURL. 2nd ed. No Starch Press, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.