APA (7th ed.) Citation

Marx, E. (1941). Bulgy, the barrage balloon. Oxford University Press.

Chicago Style (17th ed.) Citation

Marx, Enid. Bulgy, the Barrage Balloon. London ; New York: Oxford University Press, 1941.

MLA (9th ed.) Citation

Marx, Enid. Bulgy, the Barrage Balloon. Oxford University Press, 1941.