APA Citation

Helmberg, G. (1969). Introduction to spectral theory in hilbert space. Amsterdam: North Holland.

Chicago Style Citation

Helmberg, G. Introduction to Spectral Theory in Hilbert Space. Amsterdam: North Holland, 1969.

MLA Citation

Helmberg, G. Introduction to Spectral Theory in Hilbert Space. Amsterdam: North Holland, 1969.

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