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American Management Association, 1958
Buku Teks
Norcross, Harold, author
Pan Books, 1971
Buku Teks
Newman, William H.
Prentice-Hall, 1987
Buku Teks
Laisha Tatia Rizka, author
Fakultas Teknik Universitas Indonesia, 2012
UI - Skripsi (Open)
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McGraw-Hill, 1983
Buku Teks