Waller, J. C. Poor old ancestors: The popularity of medical hereditarianism, 1770 - 1870 / John C. Waller. Conference A Cultural History of Heredity II : 18th and 19th centuries.(2003).
Lua i Stíl Chicago (17ú heag.)Waller, John C. "Poor Old Ancestors: The Popularity of Medical Hereditarianism, 1770 - 1870 / John C. Waller." Conference A Cultural History of Heredity II : 18th and 19th Centuries.(2003) .
Lua MLA (8ú heag.)Waller, John C. "Poor Old Ancestors: The Popularity of Medical Hereditarianism, 1770 - 1870 / John C. Waller." Conference A Cultural History of Heredity II : 18th and 19th Centuries.(2003), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.