APA (7th ed.) Citation

Helffer, B. (2013). Spectral theory and its applications. Cambridge University Press.

Chicago Style (17th ed.) Citation

Helffer, Bernard. Spectral Theory and Its Applications. New York: Cambridge University Press, 2013.

MLA (9th ed.) Citation

Helffer, Bernard. Spectral Theory and Its Applications. Cambridge University Press, 2013.

Warning: These citations may not always be 100% accurate.