Ziegler, G. (2011). Numerical distance protection: Principles and applications (4th updated and enlarged ed.). Publicis.
Chicago Style (17th ed.) CitationZiegler, Gerhard. Numerical Distance Protection: Principles and Applications. 4th updated and enlarged ed. Erlangen: Publicis, 2011.
MLA (9th ed.) CitationZiegler, Gerhard. Numerical Distance Protection: Principles and Applications. 4th updated and enlarged ed. Publicis, 2011.
Warning: These citations may not always be 100% accurate.