Strong, Stanley R., author
John Wiley & Sons, 1982
Buku Teks
Baron, Robert A., author
Allyn and Bacon, 1987
Buku Teks
Japan : Kyushu University
Majalah, Jurnal, Buletin
Kolko, Jon, author
Elsevier, 2011
Buku Teks
Suresh, Anil K., autor
Springer, 2012
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