Gaya APA

Pitter, K. (1989). Using IBM microcomputers : WordPerfect 5.0 Lotus 1-2-3, dBase III Plus and IV, and file transfer (Ed.3rd). Watsonville, CA: Mitchell.

Gaya MLA

Pitter, Keiko. "Using IBM microcomputers : WordPerfect 5.0 Lotus 1-2-3, dBase III Plus and IV, and file transfer". Ed.3rd Watsonville, CA: Mitchell, 1989. Text.