APA (7th ed.) Citation

Card, W. I., & Creamer, B. (1961). Modern trends in gastro-enterology. Butterworths.

Chicago Style (17th ed.) Citation

Card, W. I., and B. Creamer. Modern Trends in Gastro-enterology. London: Butterworths, 1961.

MLA (8th ed.) Citation

Card, W. I., and B. Creamer. Modern Trends in Gastro-enterology. Butterworths, 1961.

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