APA (7th ed.) Citation

Black, U. D. (1991). The X series recommendations: Protocols for data communications networks. McGraw-Hill.

Chicago Style (17th ed.) Citation

Black, Uyless D. The X Series Recommendations: Protocols for Data Communications Networks. New York u.a: McGraw-Hill, 1991.

MLA (9th ed.) Citation

Black, Uyless D. The X Series Recommendations: Protocols for Data Communications Networks. McGraw-Hill, 1991.