Mills, Jean Helms, author
Routledge, Taylor & Francis Group, 2003
Buku Teks
Palmer, Ian R., author
McGraw-Hill, 2006
Buku Teks
Prentice-Hall, 2000
Buku Teks
Harvard Business School Press, 2003
Buku Teks
Bonanomi, Marcella M., author
Springer Cham, 2019
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