APA (7th ed.) Citation

Guffy, M. E. (1988). Essentials of Business Communication: A writing improvement program. PWS- KENT Publishing Company.

Chicago Style (17th ed.) Citation

Guffy, Mary Ellen. Essentials of Business Communication: A Writing Improvement Program. Boston: PWS- KENT Publishing Company, 1988.

MLA (9th ed.) Citation

Guffy, Mary Ellen. Essentials of Business Communication: A Writing Improvement Program. PWS- KENT Publishing Company, 1988.