APA (7th ed.) Citation

MacDougall, W. B. (1947). Checklist of plants of Grand Canyon National Park ([3d ed.].). Grand Canyon Natural History Association.

Chicago Style (17th ed.) Citation

MacDougall, Walter Byron. Checklist of Plants of Grand Canyon National Park. [3d ed.]. Grand Canyon, Ariz.: Grand Canyon Natural History Association, 1947.

MLA (9th ed.) Citation

MacDougall, Walter Byron. Checklist of Plants of Grand Canyon National Park. [3d ed.]. Grand Canyon Natural History Association, 1947.