APA (7th ed.) Citation

Hardie, M., & Sabin, A. K. (2011). War Posters Issued by Belligerent and Neutral Nations 1914-1919. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hardie, Martin, and Arthur K. Sabin. War Posters Issued by Belligerent and Neutral Nations 1914-1919. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Hardie, Martin, and Arthur K. Sabin. War Posters Issued by Belligerent and Neutral Nations 1914-1919. Project Gutenberg, 2011.

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