APA
Murphy H. A. &. H. H. W., . (1991). Effective business communications. New York: McGraw Hill.
Chicago
Murphy Herta A & Hildebrandt Herbert W, . 1991. Effective business communications. New York: McGraw Hill.
Harvard
Murphy H. A. &. H. H. W., . (1991). Effective business communications. New York: McGraw Hill.
MLA
Murphy Herta A & Hildebrandt Herbert W, . Effective business communications. New York: McGraw Hill. 1991.