APA (7th ed.) Citation

Sagan, L. A. (1987). The health of nations: True causes of sickness and well-being. Basic Books.

Chicago Style (17th ed.) Citation

Sagan, Leonard A. The Health of Nations: True Causes of Sickness and Well-being. New York: Basic Books, 1987.

MLA (9th ed.) Citation

Sagan, Leonard A. The Health of Nations: True Causes of Sickness and Well-being. Basic Books, 1987.