Cita APA (7th ed.)

Post, E. L. (1990). Emily Post on invitations and letters. Perennial Library.

Cita Chicago (17th ed.)

Post, Elizabeth L. Emily Post on Invitations and Letters. New York: Perennial Library, 1990.

Cita MLA (9th ed.)

Post, Elizabeth L. Emily Post on Invitations and Letters. Perennial Library, 1990.