APA (7th ed.) Citation

Thomas, K. A., Shryock, D. F., & Esque, T. C. (2019). Arizona hedgehog cactus (Echinocereus triglochidiatus var. arizonicus)--a systematic data assessment in support of recovery. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Thomas, Kathryn A., Daniel F. Shryock, and Todd C. Esque. Arizona Hedgehog Cactus (Echinocereus Triglochidiatus Var. Arizonicus)--a Systematic Data Assessment in Support of Recovery. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2019.

MLA (9th ed.) Citation

Thomas, Kathryn A., et al. Arizona Hedgehog Cactus (Echinocereus Triglochidiatus Var. Arizonicus)--a Systematic Data Assessment in Support of Recovery. U.S. Department of the Interior, U.S. Geological Survey, 2019.