Cita APA (7th ed.)

(1991). Understanding telephone electronics (3rd ed.). Texas, Instruments, Inc.

Cita Chicago (17th ed.)

Understanding Telephone Electronics. 3rd ed. Carmel, Indiana: Texas, Instruments, Inc, 1991.

Cita MLA (9th ed.)

Understanding Telephone Electronics. 3rd ed. Texas, Instruments, Inc, 1991.