APA

Post E. L., . (1990). Emily Post on business etiquette. New York: Perennial Library/Harper & Row.

Chicago

Post Elizabeth L, . 1990. Emily Post on business etiquette. New York: Perennial Library/Harper & Row.

Harvard

Post E. L., . (1990). Emily Post on business etiquette. New York: Perennial Library/Harper & Row.

MLA

Post Elizabeth L, . Emily Post on business etiquette. New York: Perennial Library/Harper & Row. 1990.