APA (7th ed.) Citation

Piçarra, J. M., Pereira, Z., & Gutiérrez-Marco, J. C. (2014). Ordovician graptolites and acritarchs from the Barrancos region (Ossa-Morena Zone, South Portugal).

Chicago Style (17th ed.) Citation

Piçarra, José Manuel, Zélia Pereira, and Juan Carlos Gutiérrez-Marco. Ordovician Graptolites and Acritarchs from the Barrancos Region (Ossa-Morena Zone, South Portugal). 2014.

MLA (8th ed.) Citation

Piçarra, José Manuel, et al. Ordovician Graptolites and Acritarchs from the Barrancos Region (Ossa-Morena Zone, South Portugal). 2014.