Elmore, W. A. (2004). Protective relaying theory and applications (2nd ed., rev. and expanded.). Marcel Dekker.

Elmore, Walter A. Protective Relaying Theory and Applications. 2nd ed., rev. and expanded. New York: Marcel Dekker, 2004.

Elmore, Walter A. Protective Relaying Theory and Applications. 2nd ed., rev. and expanded. Marcel Dekker, 2004.