Hemphill, P. D., & Hemphill, A. M. (1981). Business communications with writing improvement exercises (2nd ed.). Prentice-Hall.
Čikaški stil citiranja (17. izdanje)Hemphill, Phyllis D., i Anita M. Hemphill. Business Communications with Writing Improvement Exercises. 2nd ed. Englewood Cliffs, N.J: Prentice-Hall, 1981.
MLA način citiranja (9. izdanje)Hemphill, Phyllis D., i Anita M. Hemphill. Business Communications with Writing Improvement Exercises. 2nd ed. Prentice-Hall, 1981.
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