Clark, R. C., & Mayer, R. E. (2011). E-learning and the science of instruction: Proven guidelines for consumers and designers of multimedia learning (3rd ed.). Pfeiffer.

Clark, Ruth Colvin, and Richard E. Mayer. E-learning and the Science of Instruction: Proven Guidelines for Consumers and Designers of Multimedia Learning. 3rd ed. San Francisco, Calif.: Pfeiffer, 2011.

Clark, Ruth Colvin, and Richard E. Mayer. E-learning and the Science of Instruction: Proven Guidelines for Consumers and Designers of Multimedia Learning. 3rd ed. Pfeiffer, 2011.