CUNNINGHAM, F. (2014). Williams Obstetri. McGraw-Hill Book Company.
Lua i Stíl Chicago (17ú heag.)CUNNINGHAM, F.Gary. Williams Obstetri. McGraw-Hill Book Company, 2014.
Lua MLA (9ú heag.)CUNNINGHAM, F.Gary. Williams Obstetri. McGraw-Hill Book Company, 2014.
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