Lightman, A. P., Press, . W. H., Price, R. H., & Teukolsky, S. A. (1975). Problem book in relativity and gravitation. Princeton University Press.

Lightman, Alan P., William H. Press, Richard H. Price, and Saul A. Teukolsky. Problem Book in Relativity and Gravitation. Princeton, N.J.: Princeton University Press, 1975.

Lightman, Alan P., et al. Problem Book in Relativity and Gravitation. Princeton University Press, 1975.