Feynman, R. P., Leighton, R. B., Sands, M. L., & Penrose, R. (2011). Six not-so-easy pieces: Einstein's relativity, symmetry, and space-time. Basic Books/Perseus Books Group.
Lua i Stíl Chicago (17ú heag.)Feynman, Richard P., Robert B. Leighton, Matthew L. Sands, agus Roger Penrose. Six Not-so-easy Pieces: Einstein's Relativity, Symmetry, and Space-time. New York: Basic Books/Perseus Books Group, 2011.
Lua MLA (9ú heag.)Feynman, Richard P., et al. Six Not-so-easy Pieces: Einstein's Relativity, Symmetry, and Space-time. Basic Books/Perseus Books Group, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.