APA (7th ed.) Citation

Ahti, T., Jørgensen, P. M., & Hörður Kristinsson. (2012). Nordic lichen flora (2:nd edition.). Naturcentrum AB.

Chicago Style (17th ed.) Citation

Ahti, Teuvo, Per Magnus Jørgensen, and Hörður Kristinsson. Nordic Lichen Flora. 2:nd edition. Uddevalla: Naturcentrum AB, 2012.

MLA (9th ed.) Citation

Ahti, Teuvo, et al. Nordic Lichen Flora. 2:nd edition. Naturcentrum AB, 2012.