APA (7th ed.) Citation

Ward, R. S., & Wells, R. O. (1990). Twistor geometry and field theory. Cabridge university press.

Chicago Style (17th ed.) Citation

Ward, Richard Samuel, and R. O. Wells. Twistor Geometry and Field Theory. Cambridge: Cabridge university press, 1990.

MLA (8th ed.) Citation

Ward, Richard Samuel, and R. O. Wells. Twistor Geometry and Field Theory. Cabridge university press, 1990.