Park, Chan S.
Pearson, 2002
Buku Teks
Mitchell, Robert L., author
John Wiley & Sons, 1980
Buku Teks
Riggs, James L., author
McGraw-Hill, 1982
Buku Teks
Spencer, Milton H., author
Worth, 1971
Buku Teks
Thuesen, H.G., author
Prentice-Hall, 1971
Buku Teks