Cita APA (7th ed.)

Stallings, W. (1989). ISDN: An introduction. Macmillan.

Cita Chicago (17th ed.)

Stallings, William. ISDN: An Introduction. New York: Macmillan, 1989.

Cita MLA (9th ed.)

Stallings, William. ISDN: An Introduction. Macmillan, 1989.