Gaya APA

Crossbar Private Automatic Branch Exchanges ( PABX ) for 10 and 16 Extensions. (1962). : L. M. Ericsson Telephone Company.

Gaya MLA

Crossbar Private Automatic Branch Exchanges ( PABX ) for 10 and 16 Extensions. . : L. M. Ericsson Telephone Company, 1962. Text.