Cita APA (7th ed.)

Cheryl, H., & Parker, C. (1990). Communicating for results: A guide for business and professions (3rd ed.). Wadsworth.

Cita Chicago (17th ed.)

Cheryl, Hamilton, i Cordell Parker. Communicating for Results: A Guide for Business and Professions. 3rd ed. Belmont: Wadsworth, 1990.

Cita MLA (9th ed.)

Cheryl, Hamilton, i Cordell Parker. Communicating for Results: A Guide for Business and Professions. 3rd ed. Wadsworth, 1990.