Gould, S. J. (1977). Ontogeny and phylogeny. Belknap Press of Harvard University Press.
Lua i Stíl Chicago (17ú heag.)Gould, Stephen Jay. Ontogeny and Phylogeny. Cambridge: Belknap Press of Harvard University Press, 1977.
Lua MLA (9ú heag.)Gould, Stephen Jay. Ontogeny and Phylogeny. Belknap Press of Harvard University Press, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.