Leighton, M. M. (1919). The road building sands and gravels of Washington. F. M. Lamborn, public printer.
Cita Chicago Style (17a ed.)Leighton, Morris M. The Road Building Sands and Gravels of Washington. Olympia: F. M. Lamborn, public printer, 1919.
Cita MLA (8a ed.)Leighton, Morris M. The Road Building Sands and Gravels of Washington. F. M. Lamborn, public printer, 1919.
Precaución: Estas citas no son 100% exactas.