Washington Water Power Company & Washington Water Power Company. Information and Special Activities Department. (1979). History of the Washington Water Power Company. Washington Water Power Company, Information and Special Activities Dept..
Cita Chicago Style (17a ed.)Washington Water Power Company y Washington Water Power Company. Information and Special Activities Department. History of the Washington Water Power Company. [Spokane, Wash.]: Washington Water Power Company, Information and Special Activities Dept., 1979.
Cita MLA (8a ed.)Washington Water Power Company y Washington Water Power Company. Information and Special Activities Department. History of the Washington Water Power Company. Washington Water Power Company, Information and Special Activities Dept., 1979.