APA (7th ed.) Citation

Post, E., Post, E. L., Post, P., & Richter, J. (1992). Emily Post's etiquette. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Post, Emily, Elizabeth L. Post, Peggy Post, and Janice Richter. Emily Post's Etiquette. New York, N.Y.: HarperCollins Publishers, 1992.

MLA (8th ed.) Citation

Post, Emily, et al. Emily Post's Etiquette. HarperCollins Publishers, 1992.

Warning: These citations may not always be 100% accurate.