Dourson. Wildflowers and Ferns of Red River Gorge and the Greater Red River Basin. The University Press of Kentucky.
Style de citation Chicago (17e éd.)Dourson. Wildflowers and Ferns of Red River Gorge and the Greater Red River Basin. The University Press of Kentucky.
Style de citation MLA (9e éd.)Dourson. Wildflowers and Ferns of Red River Gorge and the Greater Red River Basin. The University Press of Kentucky.
Attention : ces citations peuvent ne pas être correctes à 100%.