Hemphill, P. D., & Hemphill, A. M. (1981). Business communications with writing improvement exercises (Second edition.). Prentice-Hall, Inc.
Chicago-viite (17. p.)Hemphill, Phyllis Davis, ja Anita M. Hemphill. Business Communications with Writing Improvement Exercises. Second edition. Englewood Cliffs, New Jersey: Prentice-Hall, Inc, 1981.
MLA-viite (9. p.)Hemphill, Phyllis Davis, ja Anita M. Hemphill. Business Communications with Writing Improvement Exercises. Second edition. Prentice-Hall, Inc, 1981.
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