Gaya APA
Beck, Robert C.. (2009).
Motivation : theories and principles (third edition).
New Jersey:
Prentice Hall.
Gaya Chicago
Beck, Robert C..
Motivation : theories and principles.
third edition
New Jersey:
Prentice Hall,
2009.
.
Gaya MLA
Beck, Robert C..
Motivation : theories and principles.
third edition
New Jersey:
Prentice Hall,
2009.
.
Gaya Turabian
Beck, Robert C..
Motivation : theories and principles.
third edition
New Jersey:
Prentice Hall,
2009.
.