APA (7th ed.) Citation

Edmunds, D. E., & Evans, W. D. (1990). Spectral Theory and Differential Operators. Clarendon Press.

Chicago Style (17th ed.) Citation

Edmunds, D. E., and W. D. Evans. Spectral Theory and Differential Operators. Oxford: Clarendon Press, 1990.

MLA (9th ed.) Citation

Edmunds, D. E., and W. D. Evans. Spectral Theory and Differential Operators. Clarendon Press, 1990.