Irvine, William
Mc-Graw-Hill , 1980
Buku Teks SO
Kavanagh, Barry F.
Prentice-Hall, 1997
Buku Teks SO
Kavanagh, Barry F.
Pearson, 2015
Buku Teks SO
Dugdale, R.H.
Erlangga, 1986
Buku Teks SO
Brinker, Russell C.
International Textbook, 1965
Buku Teks SO