Dyfyniad APA
American Institute of Aeronautics and Astronautics, United States. National Aeronautics and Space Administration, ebrary, Inc, & Allen, M. S. (2008). NASA space science vision missions. American Institute of Aeronautics and Astronautics, Inc..
Dyfyniad Arddull Chicago
American Institute of Aeronautics and Astronautics, United States. National Aeronautics and Space Administration, Inc ebrary, and Marc S. Allen. NASA Space Science Vision Missions. Reston, Va.: American Institute of Aeronautics and Astronautics, Inc., 2008.
Dyfyniad MLA
American Institute of Aeronautics and Astronautics, et al. NASA Space Science Vision Missions. American Institute of Aeronautics and Astronautics, Inc., 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.