APA引文

Hartle, J. B. (2003). Gravity: An introduction to Einstein's general relativity. Pearson education.

Chicago Edition Citation

Hartle, J. B. Gravity: An Introduction to Einstein's General Relativity. Delhi: Pearson education, 2003.

MLA引文

Hartle, J. B. Gravity: An Introduction to Einstein's General Relativity. Pearson education, 2003.

警告：這些引文格式不一定是100％准確.