Παραπομπή APA

Muller, E. (1981). Spectral theory of ordinary differential operators. Ellis Horwood.

Παραπομπή Chicago Style

Muller, Erich. Spectral Theory of Ordinary Differential Operators. Chichester: Ellis Horwood, 1981.

Παραπομπή MLA

Muller, Erich. Spectral Theory of Ordinary Differential Operators. Ellis Horwood, 1981.