Numbers, R. L., & Stephens, L. D. Darwinism in the American South: Ronald L. Numbers. Lester D. Stephens. Disseminating darwinism : the role of place, race, religion, and gender.(2001).
Chicago-referens (17:e uppl.)Numbers, Ronald L., och Lester D. Stephens. "Darwinism in the American South: Ronald L. Numbers. Lester D. Stephens." Disseminating Darwinism : The Role of Place, Race, Religion, and Gender.(2001) .
MLA-referens (8:e uppl.)Numbers, Ronald L., och Lester D. Stephens. "Darwinism in the American South: Ronald L. Numbers. Lester D. Stephens." Disseminating Darwinism : The Role of Place, Race, Religion, and Gender.(2001), .
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.