APA (7th ed.) Citation

Elwood, J. M. (1988). Casual relationships in medicine: A practical system for critical appraisal. Oxford University Press.

Chicago Style (17th ed.) Citation

Elwood, J. Mark. Casual Relationships in Medicine: A Practical System for Critical Appraisal. Oxford: Oxford University Press, 1988.

MLA (9th ed.) Citation

Elwood, J. Mark. Casual Relationships in Medicine: A Practical System for Critical Appraisal. Oxford University Press, 1988.