APA (7th ed.) Citation

Friedrichs, K. O. (1973). Spectral theory of operators in Hilbert space. Springer-Verlag.

Chicago Style (17th ed.) Citation

Friedrichs, K. O. Spectral Theory of Operators in Hilbert Space. New York: Springer-Verlag, 1973.

MLA (8th ed.) Citation

Friedrichs, K. O. Spectral Theory of Operators in Hilbert Space. Springer-Verlag, 1973.

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