APA (7th ed.) Citation

Vaucher, H., & Eckenwalder, J. E. (2003). Tree bark: A color guide. Timber Press.

Chicago Style (17th ed.) Citation

Vaucher, Hugues, and James E. Eckenwalder. Tree Bark: A Color Guide. Portland: Timber Press, 2003.

MLA (9th ed.) Citation

Vaucher, Hugues, and James E. Eckenwalder. Tree Bark: A Color Guide. Timber Press, 2003.