HOFFMAN, B. L. (2011). Williams Obstetrics Study Guide. Mc Graw- hill.
Chicago-čujuhus (17. p.)HOFFMAN, Barbara L. Williams Obstetrics Study Guide. Mc Graw- hill, 2011.
MLA-čujuhus (9. p.)HOFFMAN, Barbara L. Williams Obstetrics Study Guide. Mc Graw- hill, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.