DONALD, ROBERT B. DONALD, ROBERT B., MOORE, JAMES D., MORROW, BETTY RICHMOND., WARGETZ, LILLIAN GRIFFITH., WERNER, KATHLEEN WRITNG CLEAR PARAGRAPHS - 6th ed. - NEW JERSEY: PRENTICE-HALL, INC., 1998. ISBN: 0136465714. Dewey Class. No.: 808.042 WRI