APA (7th ed.) Citation

United States. National Aeronautics and Space Administration. (1999). Welcome to NASA's Earth Science Enterprise: Educational CD-ROM activity supplement. National Aeronautics and Space Administration.

Chicago Style (17th ed.) Citation

United States. National Aeronautics and Space Administration. Welcome to NASA's Earth Science Enterprise: Educational CD-ROM Activity Supplement. [Washington, D.C.?]: National Aeronautics and Space Administration, 1999.

MLA (9th ed.) Citation

United States. National Aeronautics and Space Administration. Welcome to NASA's Earth Science Enterprise: Educational CD-ROM Activity Supplement. National Aeronautics and Space Administration, 1999.