APA (7th ed.) Citation

Orpen, W. (1921). An onlooker in France, 1917-1919. Williams and Norgate.

Chicago Style (17th ed.) Citation

Orpen, William. An Onlooker in France, 1917-1919. London: Williams and Norgate, 1921.

MLA (9th ed.) Citation

Orpen, William. An Onlooker in France, 1917-1919. Williams and Norgate, 1921.

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