Hartle, J. B. (2014). Gravity: An introduction to Einstein's general relativity. Pearson India Education.
استشهاد بنمط شيكاغوHartle, James B. Gravity: An Introduction to Einstein's General Relativity. Noida: Pearson India Education, 2014.
MLA استشهادHartle, James B. Gravity: An Introduction to Einstein's General Relativity. Pearson India Education, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.