APA (7th ed.) Citation

Não informado. (2019). Record. AT & T Bell Laboratories.

Chicago Style (17th ed.) Citation

Não informado. Record. Murray Hill, NJ: AT & T Bell Laboratories, 2019.

MLA (8th ed.) Citation

Não informado. Record. AT & T Bell Laboratories, 2019.

Warning: These citations may not always be 100% accurate.