APA (7th ed.) Citation

Ellis, G. F. R., & Williams, R. M. (1988). Flat and curved space-times. Oxford University Press.

Chicago Style (17th ed.) Citation

Ellis, George F. R., and Ruth M. Williams. Flat and Curved Space-times. Oxford, England: Oxford University Press, 1988.

MLA (9th ed.) Citation

Ellis, George F. R., and Ruth M. Williams. Flat and Curved Space-times. Oxford University Press, 1988.