Hammerton, J. A., & Hammerton, J. A. (1925). The world's great books in outline. Amalgamated Press.

Hammerton, J. A., and J. A. Hammerton. The World's Great Books in Outline. [Place of publication not identified]: Amalgamated Press, 1925.

Hammerton, J. A., and J. A. Hammerton. The World's Great Books in Outline. Amalgamated Press, 1925.