Cita APA (7th ed.)

Black, U. D. (1995). The X series recommendations: Standards for data communications (2nd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Black, Uyless D. The X Series Recommendations: Standards for Data Communications. 2nd ed. New York: McGraw-Hill, 1995.

Cita MLA (9th ed.)

Black, Uyless D. The X Series Recommendations: Standards for Data Communications. 2nd ed. McGraw-Hill, 1995.