Stone, R. M. (1994). Harrison's principles of internal medicine: Pretest self assessment and review (13th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Stone, Richard M. Harrison's Principles of Internal Medicine: Pretest Self Assessment and Review. 13th ed. New York: McGraw-Hill, 1994.
Lua MLA (9ú heag.)Stone, Richard M. Harrison's Principles of Internal Medicine: Pretest Self Assessment and Review. 13th ed. McGraw-Hill, 1994.
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