Phillips, L Charles, author
Pearson Educational International, 2003
Buku Teks
Roberts, Michael J., author
McGraw-Hill, 2012
Buku Teks
Oppenheim, Alan V., author
Prentice-Hall, 1983
Buku Teks
Roberts, M.J., author
McGraw-Hill, 2008
Buku Teks
Poulariks, Alexander D.,
PWS-Kent Publishing, 1988
Buku Teks