Göckel, H. (1989). WordPerfect 5.0. Hüthig.
Chicago Style (17th ed.) CitationGöckel, Harald. WordPerfect 5.0. Heidelberg: Hüthig, 1989.
MLA (9th ed.) CitationGöckel, Harald. WordPerfect 5.0. Hüthig, 1989.
Warning: These citations may not always be 100% accurate.