E-learning and the science of instruction

E-learning and the science of instruction : proven guidelines for consumers and designers of multimedia learning / Ruth Colvin Clark and Richard E. Mayer  San Francisco : Pfeiffer, [2003]  ©2003 . xiv, 322 stran . ISBN 0-7879-6051-9 (vázáno) .   [2, z toho volných 1]