APA (7th ed.) Citation

Small, W. P., & Krause, U. (1972). An introduction to clinical research. Churchill Livingstone.

Chicago Style (17th ed.) Citation

Small, William Porteons, and Urban Krause. An Introduction to Clinical Research. Edinburgh: Churchill Livingstone, 1972.

MLA (9th ed.) Citation

Small, William Porteons, and Urban Krause. An Introduction to Clinical Research. Churchill Livingstone, 1972.