WILLIAMS OBSTETRICS & COX, S. M. [. (2002). Williams obstetrics: Study guide.-- ed.21. McGraw-Hill.
Chicago-čujuhus (17. p.)WILLIAMS OBSTETRICS juo Susan M. [et.al] COX. Williams Obstetrics: Study Guide.-- Ed.21. New York: McGraw-Hill, 2002.
MLA-čujuhus (9. p.)WILLIAMS OBSTETRICS juo Susan M. [et.al] COX. Williams Obstetrics: Study Guide.-- Ed.21. McGraw-Hill, 2002.
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