APA (7th ed.) Citation

Farjon, A. (2008). A natural history of conifers. Timber Press.

Chicago Style (17th ed.) Citation

Farjon, Aljos. A Natural History of Conifers. Portland, Or: Timber Press, 2008.

MLA (9th ed.) Citation

Farjon, Aljos. A Natural History of Conifers. Timber Press, 2008.