APA (7th ed.) Citation

Hitchcock, L. (1955). Vascular plants of the Pacific Northwest. University of Washington.

Chicago Style (17th ed.) Citation

Hitchcock, Leo. Vascular Plants of the Pacific Northwest. Seattle: University of Washington, 1955.

MLA (9th ed.) Citation

Hitchcock, Leo. Vascular Plants of the Pacific Northwest. University of Washington, 1955.