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American Management Association, 2009
eBooks
Still, Richard R.
Prentice-Hall, 1988
Buku Teks
Hanan, Mack
AMACOM , 1977
Buku Teks
Chesa Desinta Kusumayantie, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2018
UI - Tesis (Membership)
Niven, David, author
HarperCollins, 2003
Buku Teks