Harrow, Keith
1986,
Buku Teks SO
Puotinen, C.J.
Holt, Rinehart and Winston, 1983
Buku Teks SO
Ekabrata Yudistyra
Elex Media Komputindo, 1987
Buku Teks SO
Norton, Peter
[Publisher not identified], [Date of publication not identified]
Buku Teks SO
Rollins, Dan
Macmillan, 1985
Buku Teks SO