APA (7th ed.) Citation
Baker, B. B., & Copson, E. (1950). The mathematical theory of Huygen's principle (2a ed.). Clarendon press.
Chicago Style (17th ed.) Citation
Baker, Bevan Braithwaite, and E.T Copson. The Mathematical Theory of Huygen's Principle. 2a ed. Oxford: Clarendon press, 1950.
MLA (9th ed.) Citation
Baker, Bevan Braithwaite, and E.T Copson. The Mathematical Theory of Huygen's Principle. 2a ed. Clarendon press, 1950.
Warning: These citations may not always be 100% accurate.