(1931). Vol. 37, № 1-6; Physical Review. Second Series. 1931.
Cita Chicago (17th ed.)Vol. 37, № 1-6; Physical Review. Second Series. 1931, 1931.
Cita MLA (9th ed.)Vol. 37, № 1-6; Physical Review. Second Series. 1931, 1931.
Atenció: Aquestes cites poden no estar 100% correctes.