Não informado. (1920). Discovery: The magazine of scientific progress. Professional and Industrial Publishing.
Cita Chicago Style (17a ed.)Não informado. Discovery: The Magazine of Scientific Progress. London: Professional and Industrial Publishing, 1920.
Cita MLA (8a ed.)Não informado. Discovery: The Magazine of Scientific Progress. Professional and Industrial Publishing, 1920.
Precaución: Estas citas no son 100% exactas.