Cite Them Right 11th edition - Harvard

Computer security update [electronic] (2001). Boynton Beach, FL: Worldwide Videotext.

Chicago Manual of Style 17th edition (full note)

Computer security update. Electronic. Boynton Beach, FL: Worldwide Videotext, [2001?], Boynton Beach, FL: Worldwide Videotext, [2001?].

American Psychological Association 7th edition

Computer security update. (ca. 2001). [Electronic]. Worldwide Videotext.

Modern Language Association 9th edition

Computer security update. electronic, Worldwide Videotext, 2001.

ISO-690 (author-date, Deutsch)

Computer security update, 2001. . Boynton Beach, FL: Worldwide Videotext

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.