APA (7th ed.) Citation

Baker, B. B., & Copson, E. T. (1939). The mathematical theory of Huygens' principle. Clarendon Press.

Chicago Style (17th ed.) Citation

Baker, Bevan B., and E. T. Copson. The Mathematical Theory of Huygens' Principle. Oxford: Clarendon Press, 1939.

MLA (9th ed.) Citation

Baker, Bevan B., and E. T. Copson. The Mathematical Theory of Huygens' Principle. Clarendon Press, 1939.