Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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