المؤلفون: Marcell, Denise, Ransel, Shairstin, Schiau, Margareta, Duffy, Evelyn G.
المصدر: The Nurse Practitioner ; volume 28, issue 2, page 48-54 ; ISSN 0361-1817
الاتاحة: http://dx.doi.org/10.1097/00006205-200302000-00015http://journals.lww.com/00006205-200302000-00015