(1939). Vol. 43, № 2 (February). 1939.
Cita Chicago (17th ed.)Vol. 43, № 2 (February). 1939, 1939.
Cita MLA (9th ed.)Vol. 43, № 2 (February). 1939, 1939.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)