Cooper, Douglas
John & Sons, 2007
Buku Teks SO
Frederick E. Giesecke [and others]
Pearson education International, Prentice Hall, 2009
Buku Teks SO
Boundy, Albert W.
McGraw-Hill, 2008
Buku Teks SO
Sidheswar, N.
Tata McGraw-Hill, 1980
Buku Teks SO
Serebryakov, A.
Foreign Languages Press, [19?-]
Buku Teks SO