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Buku Teks
Haag, Stephen, author
McGraw-Hill, 1996
Buku Teks
Narayanan, V. K., author
Prentice Hall 2001, 2001
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ed. by Nick Boulter, Murray Dalziel and Jackie Hill ; foreword by David McClelland
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Buku Referensi
Stela Indriana, author
Fakultas Teknik Universitas Indonesia, 2007
UI - Skripsi (Membership)