Betrianis
Fakultas Teknik Universitas Indonesia, 2006
Artikel Jurnal
Raykov, Tenko
Routledge, Taylor & Francis Group, 2008
Buku Teks
Cooley, William W.
John Wiley & Sons, 1971
Buku Teks
Cooley, William W.
Robert E. Krieger, 1986
Buku Teks
Hardle, Wolfgang Karl
Springer, 2012
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