APA (7th ed.) Citation

Louis, A. A. (1990). Handbook of difficult diagnosis. Churchill Livingstone.

Chicago Style (17th ed.) Citation

Louis, A. A. Handbook of Difficult Diagnosis. New York: Churchill Livingstone, 1990.

MLA (9th ed.) Citation

Louis, A. A. Handbook of Difficult Diagnosis. Churchill Livingstone, 1990.