APA (7th ed.) Citation

Guard, B. J., Christy, J., & Steen, T. (1995). Wetland plants of Oregon & Washington. Lone Pine Pub..

Chicago Style (17th ed.) Citation

Guard, B. Jennifer, John Christy, and Trygve Steen. Wetland Plants of Oregon & Washington. Redmond, Wash. : Vancouver: Lone Pine Pub., 1995.

MLA (9th ed.) Citation

Guard, B. Jennifer, et al. Wetland Plants of Oregon & Washington. Lone Pine Pub., 1995.