Hartle, J. B. (2003). Gravity: An introduction to Einstein's general relativity. Pearson Education.
Citazione stile Chigago Style (17a edizione)Hartle, James B. Gravity: An Introduction to Einstein's General Relativity. San Francisco: Pearson Education, 2003.
Citatione MLA (9a ed.)Hartle, James B. Gravity: An Introduction to Einstein's General Relativity. Pearson Education, 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.