A manual for writers of research papers, theses, and dissertations, 7th edition - Kate L. Turabian 2007

CD-ROMs or DVD-ROMs
Parenthetical citations–reference list style: citing specific types of sources
Part II. Source Citation

Cite works issued on CD- or DVD-ROM as you would analogous printed works, most often books.

R: Complete National Geographic: 110 years of “National Geographic” magazine. 2000. CDROM. Mindscape.

Oxford English dictionary. 1999. 2nd ed. CD-ROM, version 2.0. New York: Oxford University Press.