APA (7th ed.) Citation

Clarke, R. (1940). Britain's blockade. Clarendon Press.

Chicago Style (17th ed.) Citation

Clarke, R.W.B. Britain's Blockade. Oxford: Clarendon Press, 1940.

MLA (9th ed.) Citation

Clarke, R.W.B. Britain's Blockade. Clarendon Press, 1940.

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