Wilder, H. H. (1926). The pedigree of the human race. H. Holt and Company.
Lua i Stíl Chicago (17ú heag.)Wilder, Harris Hawthorne. The Pedigree of the Human Race. New York: H. Holt and Company, 1926.
Lua MLA (8ú heag.)Wilder, Harris Hawthorne. The Pedigree of the Human Race. H. Holt and Company, 1926.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.