APA (7th ed.) Citation

Edmunds, D. E., & Evans, W. D. (1987). Spectral theory and differential operators. Clarendon.

Chicago Style (17th ed.) Citation

Edmunds, David E., and W. D. Evans. Spectral Theory and Differential Operators. Oxford: Clarendon, 1987.

MLA (9th ed.) Citation

Edmunds, David E., and W. D. Evans. Spectral Theory and Differential Operators. Clarendon, 1987.