(1999). Cosmic journeys to the edge of gravity, space, and time: Structure and evolution of the universe roadmap, 2003-2023 / prepared by the Structure and Evolution of the Universe Subcommittee of the Space Science Advisory Committee, National Aeronautics and Space Administration. [microform].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cosmic Journeys to the Edge of Gravity, Space, and Time: Structure and Evolution of the Universe Roadmap, 2003-2023 / Prepared by the Structure and Evolution of the Universe Subcommittee of the Space Science Advisory Committee, National Aeronautics and Space Administration. [microform]. 1999.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Cosmic Journeys to the Edge of Gravity, Space, and Time: Structure and Evolution of the Universe Roadmap, 2003-2023 / Prepared by the Structure and Evolution of the Universe Subcommittee of the Space Science Advisory Committee, National Aeronautics and Space Administration. [microform]. 1999.