Holdren, A. (2012). Google AdWords (1st edition.). Helion.
Cita Chicago Style (17a ed.)Holdren, Anastasia. Google AdWords. 1st edition. Helion, 2012.
Cita MLA (9a ed.)Holdren, Anastasia. Google AdWords. 1st edition. Helion, 2012.
Precaución: Estas citas no son 100% exactas.
