Porter, Dorothy (12 Nov 2008). "Three 19th-Century Women Doctors: Elizabeth Blackwell, Mary Walker, and Sarah Loguen Fraser". JAMA (بالإنجليزية). 300 (18): 2182–2183. DOI:10.1001/jama.2008.590. ISSN:0098-7484.
Porter, Dorothy (12 Nov 2008). "Three 19th-Century Women Doctors: Elizabeth Blackwell, Mary Walker, and Sarah Loguen Fraser". JAMA (بالإنجليزية). 300 (18): 2182–2183. DOI:10.1001/jama.2008.590. ISSN:0098-7484.