APA (7th ed.) Citation

Klein, J. (2009). Lower Cretaceous ammonites. Backhuys.

Chicago Style (17th ed.) Citation

Klein, Jaap. Lower Cretaceous Ammonites. Leiden: Backhuys, 2009.

MLA (9th ed.) Citation

Klein, Jaap. Lower Cretaceous Ammonites. Backhuys, 2009.

Warning: These citations may not always be 100% accurate.