Cita APA (7th ed.)

STALLINGS , W. (1989). ISDN AN INTRODUCTION. MAC MILLAN PUB. CO.

Cita Chicago (17th ed.)

STALLINGS , W. ISDN AN INTRODUCTION. NEW YORK: MAC MILLAN PUB. CO, 1989.

Cita MLA (9th ed.)

STALLINGS , W. ISDN AN INTRODUCTION. MAC MILLAN PUB. CO, 1989.