APA (7th ed.) Citation

(1972). Chronic duodenal ulcer. Butterworths.

Chicago Style (17th ed.) Citation

Chronic Duodenal Ulcer. London: Butterworths, 1972.

MLA (9th ed.) Citation

Chronic Duodenal Ulcer. Butterworths, 1972.

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