Maran, R. (1989). Maran Graphics' simplified computer guide WordPerfect version 5.1. Maran Graphics.
Lua i Stíl Chicago (17ú heag.)Maran, Richard. Maran Graphics' Simplified Computer Guide WordPerfect Version 5.1. Mississauga, Ont: Maran Graphics, 1989.
Lua MLA (9ú heag.)Maran, Richard. Maran Graphics' Simplified Computer Guide WordPerfect Version 5.1. Maran Graphics, 1989.
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