Lumban Gaol, Calvin Simon Andreas
Fakultas Teknik Universitas Indonesia, 2022
UI - Tesis Membership
Billington, David P.
McGraw-Hill, 1965
Buku Teks
Epstein, David G.
West Publishing Company, 1976
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Chia, Josephine
Times Books International, 2002
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Maraist, Frank L.
West, A Thomson Reuters Business, 2010
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