APA (7th ed.) Citation

Boyd, W., & Sheldon, H. (1992). Boyd's introduction to the study of disease (11th ed.). Lea & Febiger.

Chicago Style (17th ed.) Citation

Boyd, William, and Huntington Sheldon. Boyd's Introduction to the Study of Disease. 11th ed. Philadelphia: Lea & Febiger, 1992.

MLA (9th ed.) Citation

Boyd, William, and Huntington Sheldon. Boyd's Introduction to the Study of Disease. 11th ed. Lea & Febiger, 1992.