Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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