APA (7th ed.) Citation

Hoare, R. J., & Unstead, R. J. World War One: An illustrated history in colour, 1914-1918. Macdonald Educational [1973].

Chicago Style (17th ed.) Citation

Hoare, Robert J., and R. J. Unstead. World War One: An Illustrated History in Colour, 1914-1918. London: Macdonald Educational [1973].

MLA (9th ed.) Citation

Hoare, Robert J., and R. J. Unstead. World War One: An Illustrated History in Colour, 1914-1918. Macdonald Educational [1973].