Lamsdell, J. C., Briggs, D. E. G., Liu, H. P., Witzke, B. J., & McKay, R. M. (2015). The oldest described eurypterid: A giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of Iowa. BMC Evol Biol.
Čikaški stil citiranjaLamsdell, James C., Derek E. G. Briggs, Huaibao P. Liu, Brian J. Witzke, i Robert M. McKay. "The Oldest Described Eurypterid: A Giant Middle Ordovician (Darriwilian) Megalograptid From the Winneshiek Lagerstätte of Iowa." BMC Evol Biol 2015.
MLA način citiranjaLamsdell, James C., et al. "The Oldest Described Eurypterid: A Giant Middle Ordovician (Darriwilian) Megalograptid From the Winneshiek Lagerstätte of Iowa." BMC Evol Biol 2015.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.