Scheer, R. (2022). Oregon and Washington's roadside ecology: 33 easy walks through the region's amazing natural areas. Timber Press.
Cita Chicago Style (17a ed.)Scheer, Roddy. Oregon and Washington's Roadside Ecology: 33 Easy Walks Through the Region's Amazing Natural Areas. Portland, Oregon: Timber Press, 2022.
Cita MLA (8a ed.)Scheer, Roddy. Oregon and Washington's Roadside Ecology: 33 Easy Walks Through the Region's Amazing Natural Areas. Timber Press, 2022.
Precaución: Estas citas no son 100% exactas.