Gaya APA

Packard, H. (1993). Laserjet 4L HP LaserJet 4L Printer Use's Manual . Boise: Hewlett-Packard Compay.

Gaya MLA

Packard, Hewlett. "Laserjet 4L HP LaserJet 4L Printer Use's Manual". Boise: Hewlett-Packard Compay, 1993. Text.