CALLEN, P. W. (2000). Ultrasonography in obstetrics and gynecology.-- ed.4. W.B. Saunders Company.
Chicago-čujuhus (17. p.)CALLEN, Peter W. Ultrasonography in Obstetrics and Gynecology.-- Ed.4. Philadelphia: W.B. Saunders Company, 2000.
MLA-čujuhus (9. p.)CALLEN, Peter W. Ultrasonography in Obstetrics and Gynecology.-- Ed.4. W.B. Saunders Company, 2000.
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