Gaya APA
Catapult, . (1997).
Windows NT Workstation- Versi 4.0 step by step : Microsoft .
Jakarta:
Fakultas konomi niversitas Indonsia.
Gaya MLA
Catapult, .
"Windows NT Workstation- Versi 4.0 step by step : Microsoft".
Jakarta:
Fakultas konomi niversitas Indonsia,
1997.
Text.