Layman, Katie. WordPerfect 5.1 made easy / [Book]. Katie Layman. - Englewood Cliffs, N.J. : Prentice Hall, 1991. - xxi, 312 p. : ill. ; 28 cm. - Prentice Hall word processing made easy series . Includes index. ISBN: 0139631259 LCCN: 90023422 Subjects--Uniform Titles: WordPerfect (Computer file) Subjects--Topical Terms: Word processing--Computer programs..