Heinrich, B. (1979). Bumblebee economics. Harvard University Press.
Lua i Stíl Chicago (17ú heag.)Heinrich, Bernd. Bumblebee Economics. Cambridge, MA: Harvard University Press, 1979.
Lua MLA (9ú heag.)Heinrich, Bernd. Bumblebee Economics. Harvard University Press, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.