Gaya APA

Shelly, G, B. (1986). Learning to use supercalc 3, dBase III and Wordstar 3.3 : an introduction . Boston, MA: Boyd and Fraser.

Gaya MLA

Shelly, Gary, B.. "Learning to use supercalc 3, dBase III and Wordstar 3.3 : an introduction". Boston, MA: Boyd and Fraser, 1986. Text.