Kaye, T. N., & Maxwell, C. L. (1991). Plant life of Washington State: Dungeness Spit, Willapa Hills, and lower Columbia River. Washington Native Plant Society.
Cita Chicago Style (17a ed.)Kaye, Thomas N., y Cathy L. Maxwell. Plant Life of Washington State: Dungeness Spit, Willapa Hills, and Lower Columbia River. Seattle, WA: Washington Native Plant Society, 1991.
Cita MLA (8a ed.)Kaye, Thomas N., y Cathy L. Maxwell. Plant Life of Washington State: Dungeness Spit, Willapa Hills, and Lower Columbia River. Washington Native Plant Society, 1991.
Precaución: Estas citas no son 100% exactas.