Ryan, D. L. (1994). Computer-aided graphics and design (3rd ed., rev. and expanded.). Marcel Dekker.
Cita Chicago (17th ed.)Ryan, Daniel L. Computer-aided Graphics and Design. 3rd ed., rev. and expanded. New York: Marcel Dekker, 1994.
Cita MLA (9th ed.)Ryan, Daniel L. Computer-aided Graphics and Design. 3rd ed., rev. and expanded. Marcel Dekker, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.