Teaching and learning at a distance : foundations of distance education / Michael Simonson ... [et al.]. - 3rd ed. - Upper Saddle River, N.J. : Pearson/Merrill Prentice Hall, c2006. - xxi, 362 p. : ill. ; 24 cm. Includes bibliographical references and index. ISBN: 0131196308 9780131196308 LCCN: 2005041521 Subjects--Topical Terms: Distance education.Afstandsonderwijs.Internet.Enseignement �� distance. LC Class. No.: LC 5800 .T43 2006