Ballard, F. W. (1919). The valuation of public utilities: Paper presented to the Cleveland Engineering Society, September 17, 1919. s.n.
Chicago-Zitierstil (17. Ausg.)Ballard, F. W. The Valuation of Public Utilities: Paper Presented to the Cleveland Engineering Society, September 17, 1919. S.l: s.n, 1919.
MLA-Zitierstil (9. Ausg.)Ballard, F. W. The Valuation of Public Utilities: Paper Presented to the Cleveland Engineering Society, September 17, 1919. s.n, 1919.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.