Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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