APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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