APA (7th ed.) Citation

Gittings, J. G., & Gittings, R. W. V. (1966). Makers of the twentieth century. Hulton Educational Publications.

Chicago Style (17th ed.) Citation

Gittings, J. G., and R. W. V. Gittings. Makers of the Twentieth Century. London: Hulton Educational Publications, 1966.

MLA (9th ed.) Citation

Gittings, J. G., and R. W. V. Gittings. Makers of the Twentieth Century. Hulton Educational Publications, 1966.