Liebing, Ralph W.
John Wiley & Sons, 1999
Buku Teks SO
Wakita, Osamu A.
John Wiley & Sons, 1994
Buku Teks
Thomas, Marvin L.
New York: McGraw-Hill, 1978
Buku Teks SO
Wakita, Osamu A.
Wiley, 2011
Buku Teks SO
Muller, Edward J.
Pearson-Prentice-Hall, 2004
Buku Teks SO