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Thomson Wadsworth, 2002
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Verner, M. D., author
Penguin Books , 1971
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Grondin, Simon, author
Springer International Publishing, 2016
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Kartika Fitriana Subroto, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2021
UI - Tesis (Membership)
Schiffman, Harvey Richard, author
John Wiley & Sons, 1982
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