APA

Murphy H. A., Peck C. E., . (1980). Effective business communications. New York: McGraw-Hill.

Chicago

Murphy Herta A, Peck Cjarles Edwin, . 1980. Effective business communications. New York: McGraw-Hill.

Harvard

Murphy H. A., Peck C. E., . (1980). Effective business communications. New York: McGraw-Hill.

MLA

Murphy Herta A, Peck Cjarles Edwin, . Effective business communications. New York: McGraw-Hill. 1980.