Murphy, Herta A. Effective business communications / Herta A. Murphy, Herbert W. Hildebrandt. - 6th ed. - New York : McGraw-Hill, c1991. - xxiv, [8], 840 p. : ill. (some col.) ; 24 cm. ISBN: 007044157X 0070441596 (test bank) 0070441588 (instructor's manual) 007044160X (study guide) LCCN: 90006239 LC Class. No.: HF5721 ..M85 1991 / .M85 1991 Dewey Class. No.: 651.7