APA (7th ed.) Citation

Dörken, V. M., & Nimsch, H. (2018). A monograph of leaf characters in the genus Abies (Abietoideae, Pinaceae). Verlag Kessel.

Chicago Style (17th ed.) Citation

Dörken, Veit Martin, and Hubertus Nimsch. A Monograph of Leaf Characters in the Genus Abies (Abietoideae, Pinaceae). Remagen: Verlag Kessel, 2018.

MLA (9th ed.) Citation

Dörken, Veit Martin, and Hubertus Nimsch. A Monograph of Leaf Characters in the Genus Abies (Abietoideae, Pinaceae). Verlag Kessel, 2018.