APA
Post P., Post E. & Post P. (2005). Emily post's the etiquette advantage in business : personal skills for professional success. New York: Harper Resource.
Chicago
Post Peggy, Post Emily and Post Peter. 2005. Emily post's the etiquette advantage in business : personal skills for professional success. New York: Harper Resource.
Harvard
Post P., Post E. and Post P. (2005). Emily post's the etiquette advantage in business : personal skills for professional success. New York: Harper Resource.
MLA
Post Peggy, Post Emily and Post Peter. Emily post's the etiquette advantage in business : personal skills for professional success. New York: Harper Resource. 2005.