Gray, N. (2019). A student's guide to general relativity. Cambridge University Press. https://doi.org/10.1017/9781316869659
Cita Chicago (17th ed.)Gray, Norman. A Student's Guide to General Relativity. Cambridge, United Kingdom: Cambridge University Press, 2019. https://doi.org/10.1017/9781316869659.
Cita MLA (9th ed.)Gray, Norman. A Student's Guide to General Relativity. Cambridge University Press, 2019. https://doi.org/10.1017/9781316869659.
Atenció: Aquestes cites poden no estar 100% correctes.