Sunarsih
Faculty of Engineering, Universitas Indonesia, 2015
Artikel Jurnal
Ellsworth, P.T.
Macmillan, 1975
Buku Teks
Lewis, Mervyn Keith
Philip Allan , 1987
Buku Teks
Berger, Bernhard
Thoson Reuters, 2010
Buku Teks
Vernon, Raymond
Prentice-Hall, 1996
Buku Teks