Não informado. (1941). Bell Telephone Magazine. American Telephone and Telegraph Company.
Cita Chicago Style (17a ed.)Não informado. Bell Telephone Magazine. New York: American Telephone and Telegraph Company, 1941.
Cita MLA (8a ed.)Não informado. Bell Telephone Magazine. American Telephone and Telegraph Company, 1941.
Precaución: Estas citas no son 100% exactas.