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.
Atenció: Aquestes cites poden no estar 100% correctes.