APA Citation

 Sklar, J. (2012).  Principles of Web Design: The Web Technologies Series.  Course Technology.

Chicago Style Citation

 Sklar, Joel.  Principles of Web Design: The Web Technologies Series.  Course Technology, 2012.

MLA Citation

 Sklar, Joel.  Principles of Web Design: The Web Technologies Series.  Course Technology, 2012.

Warning: These citations may not always be 100% accurate.