APA (7th ed.) Citation

Clarke, R. W. B. (1941). Britain's blockade. Oxford Univ. Pr.

Chicago Style (17th ed.) Citation

Clarke, R. W. B. Britain's Blockade. New York [u.a.]: Oxford Univ. Pr, 1941.

MLA (8th ed.) Citation

Clarke, R. W. B. Britain's Blockade. Oxford Univ. Pr, 1941.