Jones, H. M., & Stern, M. R. (1975). The twentieth century: With a general introd. by the ed. and a prefatory essay by Howard Mumford Jones. Penguin Books.

Jones, Howard Mumford, and Milton R. Stern. The Twentieth Century: With a General Introd. by the Ed. and a Prefatory Essay by Howard Mumford Jones. Harmondsworth: Penguin Books, 1975.

Jones, Howard Mumford, and Milton R. Stern. The Twentieth Century: With a General Introd. by the Ed. and a Prefatory Essay by Howard Mumford Jones. Penguin Books, 1975.