Chomsky, Noam
Bentang, 2017
Buku Teks
Jane's Information Group, 1999
Buku Referensi
Whittaker, David J.
Routledge, 2004
Buku Teks
edited by Abdul Rashid Moten and Noraini M. Noor
Thomson , 2007
Buku Teks
Alexander, Roy, 1925-
American Management Association;, 2009
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