Cambridge University Press, 2018
eBooks
Goldsmid, John
New South Wales University Press, 1988
Buku Teks
Pushies, Fred, author
American Management Association, 2009
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Fakultas Ilmu Pengatahuan Budaya Universitas Indonesia, 2005
UI - Tugas Akhir
Miller, Seumas, author
Blackwell Publishing, 2009
Buku Teks