APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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