Peale, Norman Vincent, 1898-1993, author
Binarupa Aksara, 1993
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Butscher, Stephan A., author
PPM, 2006
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Maxwell, John C., author
Menuju Insan Cemerlang, 2014
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McGrath, John, author
Gramedia Pustaka Utama, 2006
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Pardiyono
Yogyakarta : Andi Offset, 2005,
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