Grinnell, F. Everyday practice of science. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Grinnell, Frederick. Everyday Practice of Science. Oxford University Press.
Lua MLA (8ú heag.)Grinnell, Frederick. Everyday Practice of Science. Oxford University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.