Electric Power Research Institute & Eckroad, S. W. (2007). EPRI underground transmission systems reference book (2006 ed.). Electric Power Research Institute.
Citazione stile Chigago Style (17a edizione)Electric Power Research Institute e S. W. Eckroad. EPRI Underground Transmission Systems Reference Book. 2006 ed. Palo Alto, Calif: Electric Power Research Institute, 2007.
Citatione MLA (9a ed.)Electric Power Research Institute e S. W. Eckroad. EPRI Underground Transmission Systems Reference Book. 2006 ed. Electric Power Research Institute, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.