APA (7th ed.) Citation

Hacker, B. C., & Grimwood, J. M. (1977). On the shoulders of titans. National Aeronautics and Space Administration.

Chicago Style (17th ed.) Citation

Hacker, Barton C., and James M. Grimwood. On the Shoulders of Titans. Washington, D.C: National Aeronautics and Space Administration, 1977.

MLA (9th ed.) Citation

Hacker, Barton C., and James M. Grimwood. On the Shoulders of Titans. National Aeronautics and Space Administration, 1977.