Não informado. (1931). Physics: A journal of general and applied physics conducted by the American Physical Society. American Physical Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Physics: A Journal of General and Applied Physics Conducted by the American Physical Society. New York: American Physical Society, 1931.
Lua MLA (8ú heag.)Não informado. Physics: A Journal of General and Applied Physics Conducted by the American Physical Society. American Physical Society, 1931.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.