APA-čujuhus (7. p.)
Comfort, A. (1980). What is a doctor?: Essays on medicine and human natural history. George F. Stickley.
Chicago-čujuhus (17. p.)
Comfort, Alex. What Is a Doctor?: Essays on Medicine and Human Natural History. Philadelphia: George F. Stickley, 1980.
MLA-čujuhus (9. p.)
Comfort, Alex. What Is a Doctor?: Essays on Medicine and Human Natural History. George F. Stickley, 1980.
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