APA (7th ed.) Citation

(1997). Digital subscriber signalling system no. 1 - data link layer: Specification. ITU-T.

Chicago Style (17th ed.) Citation

Digital Subscriber Signalling System No. 1 - Data Link Layer: Specification. Genève: ITU-T, 1997.

MLA (9th ed.) Citation

Digital Subscriber Signalling System No. 1 - Data Link Layer: Specification. ITU-T, 1997.

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