APA (7th ed.) Citation

Clark, L. J., & Trelawny, J. G. S. (1975). Lewis Clark's Field guide to wild flowers of the mountains in the Pacific Northwest. Gray's Publishing.

Chicago Style (17th ed.) Citation

Clark, Lewis J., and John G. S. Trelawny. Lewis Clark's Field Guide to Wild Flowers of the Mountains in the Pacific Northwest. Sidney, B.C.: Gray's Publishing, 1975.

MLA (9th ed.) Citation

Clark, Lewis J., and John G. S. Trelawny. Lewis Clark's Field Guide to Wild Flowers of the Mountains in the Pacific Northwest. Gray's Publishing, 1975.