APA (7th ed.) Citation

Kellar, R. J. (1963). Modern trends in obstetrics. Butter Worths.

Chicago Style (17th ed.) Citation

Kellar, R. J. Modern Trends in Obstetrics. London: Butter Worths, 1963.

MLA (9th ed.) Citation

Kellar, R. J. Modern Trends in Obstetrics. Butter Worths, 1963.

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