Type the name of the encyclopedia article in quotes, such as "Title." Be sure to include the period and the quotation marks.
Type the encyclopedia's name in italics with a period at the end.
Type "CD-ROM." Be sure to include the period but exclude the quotation marks. Include the version of the CD-ROM if there is more than one and follow that with a period as well, as in Ver. 2.0.
Include the CD-ROM's publisher and the place and date of the publication, such as Place: Publisher, date. Be sure to include all of the punctuation.
Type the author and title of the encyclopedia article, such as Author or Editor (Year). Title (Edition). Be sure to put the title in italics and include the year and edition if you have the information.
Type [CD-ROM].(Year Published). Include the brackets and the period. Include the name of the CD-ROM's producer, if applicable.
Type "Available: Encyclopedia Name [Access Date]." Include the date that you accessed the information from the CD-ROM encyclopedia.