APA (7th ed.) Citation

Howat, G. M. D., & Taylor, A. J. P. (1973). Dictionary of world history. Nelson.

Chicago Style (17th ed.) Citation

Howat, G. M. D., and A. J. P. Taylor. Dictionary of World History. London: Nelson, 1973.

MLA (8th ed.) Citation

Howat, G. M. D., and A. J. P. Taylor. Dictionary of World History. Nelson, 1973.