Não informado. (1920). Discovery: The magazine of scientific progress. Professional and Industrial Publishing.
Čikaški stil citiranja (17. izdanje)Não informado. Discovery: The Magazine of Scientific Progress. London: Professional and Industrial Publishing, 1920.
MLA način citiranja (8. izdanje)Não informado. Discovery: The Magazine of Scientific Progress. Professional and Industrial Publishing, 1920.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.