edited by Elena Andresen, Erin DeFries Bouldin
Jossey- Bass, 2010
Buku Teks
Carney, Jan K.
Jones Bartlett Learning, 2016
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Burt, Brian A.
An academic Internet Publishers, 2007
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Keefe, Robert H.
Springer Publishing Company, 2013
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Turnock, Bernard J.
Jones & Bartlett Learning, 2016
Buku Teks