Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

Feynman, Richard P., Robert B. Leighton, Matthew L. Sands, i Roger Penrose. Six Not-so-easy Pieces: Einstein's Relativity, Symmetry, and Space-time. New York: Basic Books/Perseus Books Group, 2011.

Cita MLA (9th ed.)

Feynman, Richard P., et al. Six Not-so-easy Pieces: Einstein's Relativity, Symmetry, and Space-time. Basic Books/Perseus Books Group, 2011.