Παραπομπή APA

Edmunds, D. E., & Evans, W. D. (1990). Spectral theory and differential operators. Oxford [Oxfordshire]: Oxford University Press.

Παραπομπή Chicago Style

Edmunds, D. E., and W. D. Evans. Spectral Theory and Differential Operators. Oxford [Oxfordshire]: Oxford University Press, 1990.

Παραπομπή MLA

Edmunds, D. E., and W. D. Evans. Spectral Theory and Differential Operators. Oxford [Oxfordshire]: Oxford University Press, 1990.

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