edited by Gian-Vittorio Caprara and Guus L. Van Heck
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Meadow, Mary Jo
Kanisius , 1995
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Alwisol
Universitas Muhammadiyah Malang, 2016
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Covey, Stephen R.
Bina Rupa Aksara, 1997
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Sumadi Suryabrata
RajaGrafindo Persada, 1998
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