APA استشهاد

Held, G. (1999). Handbook of communications systems management. Viva Book.

استشهاد بنمط شيكاغو

Held, Gilbert. Handbook of Communications Systems Management. New Delhi: Viva Book, 1999.

MLA استشهاد

Held, Gilbert. Handbook of Communications Systems Management. Viva Book, 1999.