APA (7th ed.) Citation

Post, P., & Post, E. (2004). Emily Post's Etiquette (17th ed.). HarperResource.

Chicago Style (17th ed.) Citation

Post, Peggy, and Emily Post. Emily Post's Etiquette. 17th ed. New York: HarperResource, 2004.

MLA (9th ed.) Citation

Post, Peggy, and Emily Post. Emily Post's Etiquette. 17th ed. HarperResource, 2004.