Francis, R. C. (2004). Why men won't ask for directions: The seductions of sociobiology. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Francis, Richard C. Why Men Won't Ask for Directions: The Seductions of Sociobiology. Princeton, New Jersey: Princeton University Press, 2004.
Lua MLA (9ú heag.)Francis, Richard C. Why Men Won't Ask for Directions: The Seductions of Sociobiology. Princeton University Press, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.