APA (7th ed.) Citation

Goddard Space Flight Center. (1991). What is the greenhouse effect? National Aeronautics and Space Administration, Goddard Space Flight Center.

Chicago Style (17th ed.) Citation

Goddard Space Flight Center. What Is the Greenhouse Effect? Greenbelt, Md.: National Aeronautics and Space Administration, Goddard Space Flight Center, 1991.

MLA (9th ed.) Citation

Goddard Space Flight Center. What Is the Greenhouse Effect? National Aeronautics and Space Administration, Goddard Space Flight Center, 1991.