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