APA (7th ed.) Citation

Smart, W. K., & McKelvey, L. W. (1950). Business letters (3d. ed.). Harper.

Chicago Style (17th ed.) Citation

Smart, Walter Kay, and Louis William McKelvey. Business Letters. 3d. ed. New York: Harper, 1950.

MLA (9th ed.) Citation

Smart, Walter Kay, and Louis William McKelvey. Business Letters. 3d. ed. Harper, 1950.