Morison, e. G. h. R. S. (1979). Limits of scientific inquiry. Norton.
Lua i Stíl Chicago (17ú heag.)Morison, ed. Gerald holton; Robert S. Limits of Scientific Inquiry. Norton, 1979.
Lua MLA (8ú heag.)Morison, ed. Gerald holton; Robert S. Limits of Scientific Inquiry. Norton, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.