APA (7th ed.) Citation

Crofton, J. W., & Douglas, A. (1981). Respiratory diseases. Blackwell Scientific.

Chicago Style (17th ed.) Citation

Crofton, John Wenman, and Andrew Douglas. Respiratory Diseases. Oxford: Blackwell Scientific, 1981.

MLA (9th ed.) Citation

Crofton, John Wenman, and Andrew Douglas. Respiratory Diseases. Blackwell Scientific, 1981.