APA (7th ed.) Citation

Laboratory for High Energy Astrophysics (Goddard Space Flight Center) & Whitlock, L. A. (1999). Imagine the universe (Version 3.). The Center.

Chicago Style (17th ed.) Citation

Laboratory for High Energy Astrophysics (Goddard Space Flight Center) and Laura A. Whitlock. Imagine the Universe. Version 3. [Greenbelt, Md.]: The Center, 1999.

MLA (9th ed.) Citation

Laboratory for High Energy Astrophysics (Goddard Space Flight Center) and Laura A. Whitlock. Imagine the Universe. Version 3. The Center, 1999.