Παραπομπή APA

Sachs, R. K., & Wu, H. (1977). General relativity for mathematicians. Springer-Verlag.

Παραπομπή Chicago Style

Sachs, R. K., και Hung-hsi Wu. General Relativity for Mathematicians. New York: Springer-Verlag, 1977.

Παραπομπή MLA

Sachs, R. K., και Hung-hsi Wu. General Relativity for Mathematicians. Springer-Verlag, 1977.