Παραπομπή APA

Davies, E. B. (1995). Spectral theory and differential operators. Cambridge University Press.

Παραπομπή Chicago Style

Davies, E. B. Spectral Theory and Differential Operators. Cambridge ; New York: Cambridge University Press, 1995.

Παραπομπή MLA

Davies, E. B. Spectral Theory and Differential Operators. Cambridge University Press, 1995.