APA (7e ed.) Bronvermelding

American Telephone and Telegraph Company & American Telephone and Telegraph Company. Information Dept. Bell Telephone magazine. American Telephone and Telegraph Co., etc.].

Chicago (17e ed.) Bronvermelding

American Telephone and Telegraph Company en American Telephone and Telegraph Company. Information Dept. Bell Telephone Magazine. [New York: American Telephone and Telegraph Co., etc.].

MLA (8e ed.) Bronvermelding

American Telephone and Telegraph Company en American Telephone and Telegraph Company. Information Dept. Bell Telephone Magazine. American Telephone and Telegraph Co., etc.].