ISBN 0135137764 books & textbook
Teaching and Learning at a Distance: Foundations of Distance Education (4th Edition)
Simonson, Michael Smaldino, Sharon E. Albright, Michael Zvacek, Susan
Prentice Hall /2008-04-04 Paperback / 416 Pages
isbn-10: 0135137764 / isbn-13: 9780135137765
