Steven F. Hick, Thomas Bien, author
The Guilford Press, 2008
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Schuster, Pamela McHugh
F.A. Davis Company, 2000
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Young, Shinzen
Sounds True, 2004
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Ega Agustine
Universitas Indonesia, 2012
UI - Tesis (Open)
Mahathera, Ven H. Gunaratana
Wisma Sambodhi, 1990
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