APA (7th ed.) Citation

Wallace, W. K. (1926). Thirty Years of modern history. Allen & Unwin [usw.].

Chicago Style (17th ed.) Citation

Wallace, William Kay. Thirty Years of Modern History. London: Allen & Unwin [usw.], 1926.

MLA (9th ed.) Citation

Wallace, William Kay. Thirty Years of Modern History. Allen & Unwin [usw.], 1926.

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