Berman, Barry
Prentice Hall International, 1998
Buku Teks
Berman, Barry
Pearson-Prentice Hall, 2007
Buku Teks
Rachman, David J.
Prentice-Hall, 1969
Buku Teks
Zentes, Joachim
Gabler Verlag, 2011
eBooks
Hill, Charles W.L.
Houghton Mifflin , 1989
Buku Teks