APA (7th ed.) Citation

Gilleland, K., & Coel, M. (1991). 450 best sales letters for every selling situation. Prentice Hall.

Chicago Style (17th ed.) Citation

Gilleland, Karen, and Margaret Coel. 450 Best Sales Letters for Every Selling Situation. Englewood Cliffs, N.J: Prentice Hall, 1991.

MLA (9th ed.) Citation

Gilleland, Karen, and Margaret Coel. 450 Best Sales Letters for Every Selling Situation. Prentice Hall, 1991.