APA (7th ed.) Citation

Astor, D. (1952). The Twentieth Century (formerly the nineteeth century and after). publ. by the proprietor, the Hon. F.D.L. Astor.

Chicago Style (17th ed.) Citation

Astor, David. The Twentieth Century (formerly the Nineteeth Century and After). London: publ. by the proprietor, the Hon. F.D.L. Astor, 1952.

MLA (9th ed.) Citation

Astor, David. The Twentieth Century (formerly the Nineteeth Century and After). publ. by the proprietor, the Hon. F.D.L. Astor, 1952.

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