Palloff, Rena M. Building learning communities in cyberspace: effective strategies for the online classroom/ Rena M. Palloff, Keith Pratt - XXIV, 206 p. \ 23 cm ISBN: 0-7879-4460-2 Subjects--Topical Terms: 1.Educación a distancia---Estados Unidos Dewey Class. No.: 378.175 P169b