APA (7th ed.) Citation

O'Connor, H. (1941). The Astors. A. A. Knopf.

Chicago Style (17th ed.) Citation

O'Connor, Harvey. The Astors. New York: A. A. Knopf, 1941.

MLA (9th ed.) Citation

O'Connor, Harvey. The Astors. A. A. Knopf, 1941.

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