Hartle, J. B. (2003). Gravity: An introduction to Einstein's general relativity. Addison-Wesley ; Pearson.
Čikaški stil citiranja (17. izdanje)Hartle, J. B. Gravity: An Introduction to Einstein's General Relativity. San Francisco ; New Delhi: Addison-Wesley ; Pearson, 2003.
MLA način citiranja (8. izdanje)Hartle, J. B. Gravity: An Introduction to Einstein's General Relativity. Addison-Wesley ; Pearson, 2003.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.