Moustakas, Clark E.
Phenomenological research methods
Sage Publications, 1994
Buku Teks
Petri, Herbert L
Motivation : theory, research and application
Cengage Learning, 2013
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Schunk, Dale H.
Motivation in education: theory, research, and applications
Prentice-Hall, 1996
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Reich, John W.
Perceived control: theory, research, and practice in the first 50 years
Oxford University Press, 2016
eBooks
Advances in psychological science = Recents developpments en psychologie scientifique
Psychology Press, 1998
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