Behavior change in the human services : an introduction to principles and applications /
Sundel, Martin,1940-
Sundel, Sandra Stone.Behavior modification in the human services.
Thousand Oaks, Calif. ; London : Sage,
c1999.
Previous ed.: published as Behavior modification in the human services. /by Sandra S. Sundel & Martin Sundel. 1993.
Includes bibliographical references and indexes.
Behavior modification.