Sneddon, Ian N.
McGraw-Hill, 1957
Buku Teks
Ames, William F., author
Academic Press, 1977
Buku Teks
Trim, Donald W.
PWS, 1990
Buku Teks
Schechter, Martin, author
McGraw-Hill, 1977
Buku Teks
Gockenbach, Mark S., author
American Management Association, 2011
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