Παραπομπή APA

Elgerd, O. I. (1971). Electric energy systems theory: :an introduction. Tata Mc Graw - Hill.

Παραπομπή Chicago Style

Elgerd, Olle I. Electric Energy Systems Theory: :an Introduction. New Delhi: Tata Mc Graw - Hill, 1971.

Παραπομπή MLA

Elgerd, Olle I. Electric Energy Systems Theory: :an Introduction. Tata Mc Graw - Hill, 1971.