APA (7th ed.) Citation

(1997). The Frankfurt CD-ROM. The electronic guide to the Frankfurt book fair.

Chicago Style (17th ed.) Citation

The Frankfurt CD-ROM. The Electronic Guide to the Frankfurt Book Fair. 1997.

MLA (9th ed.) Citation

The Frankfurt CD-ROM. The Electronic Guide to the Frankfurt Book Fair. 1997.

Warning: These citations may not always be 100% accurate.