Warrington, A. R. v. C. (1968). Protective relays: Their theory and practice (2nd ed.). Chapman & Hall.
Chicago-referens (17:e uppl.)Warrington, A. R. van C. Protective Relays: Their Theory and Practice. 2nd ed. London: Chapman & Hall, 1968.
MLA-referens (8:e uppl.)Warrington, A. R. van C. Protective Relays: Their Theory and Practice. 2nd ed. Chapman & Hall, 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.