APA (7th ed.) Citation

Ulrich, L., & Lamb, S. (1999). Wildflowers of the pacific northwest. Companion Press.

Chicago Style (17th ed.) Citation

Ulrich, Larry, and Susan Lamb. Wildflowers of the Pacific Northwest. Santa Barbara, CA: Companion Press, 1999.

MLA (9th ed.) Citation

Ulrich, Larry, and Susan Lamb. Wildflowers of the Pacific Northwest. Companion Press, 1999.