Simpson, Henry
McGraw-Hill, 1986
Buku Teks
Abel, Peter, 1932-
Prentice-Hall, 1997
Buku Teks
Thorne, Michael
Benjamin Cumming, 1986
Buku Teks
Erskine, Robert
Elex Media Komputindo, 1987
Buku Teks SO
Norton, Peter
[publisher not identified], [date of publication not identified]
Buku Teks SO