APA (7th ed.) Citation

Thirkell, A. (1951). The duke's daughter ([1st American ed.].). Knopf.

Chicago Style (17th ed.) Citation

Thirkell, Angela. The Duke's Daughter. [1st American ed.]. New York: Knopf, 1951.

MLA (9th ed.) Citation

Thirkell, Angela. The Duke's Daughter. [1st American ed.]. Knopf, 1951.