Gaya APA

Grupe, F, H. (1980). Microcomputer Applications: Using PC Writer, ExpressCalc, and PC-File III . United States of America: Wm. C. Brown Publishers.

Gaya MLA

Grupe, Fritz, H.. "Microcomputer Applications: Using PC Writer, ExpressCalc, and PC-File III". United States of America: Wm. C. Brown Publishers, 1980. Text.