APA (7th ed.) Citation

Hardie, M. (1920). War Posters issued by belligerent and neutral nations 1914-1919. Black.

Chicago Style (17th ed.) Citation

Hardie, Martin. War Posters Issued by Belligerent and Neutral Nations 1914-1919. London: Black, 1920.

MLA (9th ed.) Citation

Hardie, Martin. War Posters Issued by Belligerent and Neutral Nations 1914-1919. Black, 1920.

Warning: These citations may not always be 100% accurate.