APA (7th ed.) Citation

(1969). Planetary Explorer Summary Description. Goddard Space Flight Center.

Chicago Style (17th ed.) Citation

Planetary Explorer Summary Description. Greenbelt, Md: Goddard Space Flight Center, 1969.

MLA (9th ed.) Citation

Planetary Explorer Summary Description. Goddard Space Flight Center, 1969.

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