APA (7th ed.) Citation

(1997). The Complete National Geographic [: 109 years of National Geographic Magazine on CD-ROM. National Geographic Society.

Chicago Style (17th ed.) Citation

The Complete National Geographic [: 109 Years of National Geographic Magazine on CD-ROM. Washington: National Geographic Society, 1997.

MLA (9th ed.) Citation

The Complete National Geographic [: 109 Years of National Geographic Magazine on CD-ROM. National Geographic Society, 1997.