APA (7e ed.) Bronvermelding

Hemphill, P. D., & McCormick, D. W. (1991). Business communications with writing improvement exercises (4th ed.). Regents/Prentice-Hall.

Chicago (17e ed.) Bronvermelding

Hemphill, Phyllis Davis, en Donald W. McCormick. Business Communications with Writing Improvement Exercises. 4th ed. Englewood Cliffs, NJ: Regents/Prentice-Hall, 1991.

MLA (9e ed.) Bronvermelding

Hemphill, Phyllis Davis, en Donald W. McCormick. Business Communications with Writing Improvement Exercises. 4th ed. Regents/Prentice-Hall, 1991.