Hill, Michael
Sage, 2014
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Clarke E. Cochran, Lawrence C. Mayer, T.R. Carr, N. Joseph Cayer, Mark J. McKenzie, Laura R. Peck
USA Cengage Learning, 2016
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M. Irfan Islamy
Bumi aksara, 2009
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White, Leonard D.
Macmillan, 1955
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Stopher, Peter R.
Edward Elgar Publishing Limited, 2016
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