Motivation :
Beck, Robert C. (Robert Clarence).
Motivation : theories and principles / Robert C. Beck. - 3rd ed. - Englewood Cliffs, New Jersey : Prentice Hall, c1990. - xii, 414 p. : ill. ; 24 cm.
Includes bibliographical references and index.
0136030777
Motivation (Psychology).
BF503 / .B43 1990
Motivation : theories and principles / Robert C. Beck. - 3rd ed. - Englewood Cliffs, New Jersey : Prentice Hall, c1990. - xii, 414 p. : ill. ; 24 cm.
Includes bibliographical references and index.
0136030777
Motivation (Psychology).
BF503 / .B43 1990