United States. Energy Information Administration. Major extra high voltage transmission lines, December 31, 1977.
Chicago Style (17th ed.) CitationUnited States. Energy Information Administration. Major Extra High Voltage Transmission Lines, December 31, 1977.
MLA (9th ed.) CitationUnited States. Energy Information Administration. Major Extra High Voltage Transmission Lines, December 31, 1977.
Warning: These citations may not always be 100% accurate.