by Maslow , Abraham H.
by Doddington, Christini and Hilton, Mary.
by O'Leary, Zina.
by Schunk, Dale,; Meece, Judith; Pintrich, Paul.
by Creswell, John W.
by Best, John W; Kahn, James V; Jha, Arbind K.
by Murphy, Kevin R; Davidshofes, Charles O.
by Bajpai , Naval.
by Carver , Charles S.
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