APA
Farjon A., . (2008). A Natural History of Conifers. Oregon: Timber Press.
Chicago
Farjon Aljos, . 2008. A Natural History of Conifers. Oregon: Timber Press.
Harvard
Farjon A., . (2008). A Natural History of Conifers. Oregon: Timber Press.
MLA
Farjon Aljos, . A Natural History of Conifers. Oregon: Timber Press. 2008.