Harvard Business School
Harvard Business Review Press, 2010
Buku Teks
American Management Association, 1957
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Werther, William B., author
Tianxia Wenhua Chuban, 1990
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Anissa Larasati Nugroho, author
2018
UI - Skripsi (Membership)
Diekelmann, Nancy L., author
Addison-Wesley, 1997
Buku Teks