Não informado. (1941). Bell Telephone Magazine. American Telephone and Telegraph Company.
Chicago Style (17th ed.) CitationNão informado. Bell Telephone Magazine. New York: American Telephone and Telegraph Company, 1941.
MLA (8th ed.) CitationNão informado. Bell Telephone Magazine. American Telephone and Telegraph Company, 1941.
Warning: These citations may not always be 100% accurate.