TY  - GEN
AU  - Beck, Robert C. (Robert Clarence).
TI  - Motivation: theories and principles 
SN  - 0136030777
AV  - BF503 .B43 1990
PY  - 1990///
CY  - Englewood Cliffs, New Jersey
PB  - Prentice Hall
KW  - Motivation (Psychology)
N1  - Includes bibliographical references and index
ER  -