Weiss, Emilio; Strauss, Bernard S. (27 de diciembre de 1990) [1991], «The Life and Career of Howard Taylor Ricketts», Reviews of Infectious Diseases (The University of Chicago) 13 (6): 1241-2, PMID1775858, doi:10.1093/clinids/13.6.1241.
Weiss, Emilio; Strauss, Bernard S. (27 de diciembre de 1990) [1991], «The Life and Career of Howard Taylor Ricketts», Reviews of Infectious Diseases (The University of Chicago) 13 (6): 1241-2, PMID1775858, doi:10.1093/clinids/13.6.1241.