Guard, B. J., & Steen, T. (1995). Wetland plants of Oregon & Washington. Lone Pine Publishing.
Cita Chicago Style (17a ed.)Guard, B. Jennifer, y Trygve Steen. Wetland Plants of Oregon & Washington. Redmond, Wash.: Lone Pine Publishing, 1995.
Cita MLA (8a ed.)Guard, B. Jennifer, y Trygve Steen. Wetland Plants of Oregon & Washington. Lone Pine Publishing, 1995.
Precaución: Estas citas no son 100% exactas.