APA (7th ed.) Citation

Eckenwalder, J. E. (2009). Conifers of the world: The complete reference. Timber Press.

Chicago Style (17th ed.) Citation

Eckenwalder, James E. Conifers of the World: The Complete Reference. Portland: Timber Press, 2009.

MLA (8th ed.) Citation

Eckenwalder, James E. Conifers of the World: The Complete Reference. Timber Press, 2009.