Παραπομπή APA

Hartle, J. B. (2014). Gravity: An introduction to Einstein's general relativity. Pearson India Education.

Παραπομπή Chicago Style

Hartle, James B. Gravity: An Introduction to Einstein's General Relativity. Noida: Pearson India Education, 2014.

Παραπομπή MLA

Hartle, James B. Gravity: An Introduction to Einstein's General Relativity. Pearson India Education, 2014.