APA (7th ed.) Citation

Welford, W. T. (1981). Optics (2nd ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Welford, W. T. Optics. 2nd ed. Oxford: Oxford University Press, 1981.

MLA (9th ed.) Citation

Welford, W. T. Optics. 2nd ed. Oxford University Press, 1981.