Elwood, J. M. (1988). Casual relationships in medicine: A practical system for critical appraisal. Oxford University Press.
Chicago-viite (17. p.)Elwood, J. Mark. Casual Relationships in Medicine: A Practical System for Critical Appraisal. Oxford: Oxford University Press, 1988.
MLA-viite (9. p.)Elwood, J. Mark. Casual Relationships in Medicine: A Practical System for Critical Appraisal. Oxford University Press, 1988.
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