Cita APA

Tortello, F., Clarkson, E., Uriz, N. J., Alfaro, M., & Galeano Inchausti, J. C. (2008). Trilobites from Vargas Peña (Llandovery) of Itaugúa, eastern Paraguay: Advances in trolobites research. Web

Citación estilo Chicago

Tortello, Franco, E.N.K Clarkson, Norberto J. Uriz, Marta Alfaro, and Julio César Galeano Inchausti. Trilobites From Vargas Peña (Llandovery) of Itaugúa, Eastern Paraguay: Advances in Trolobites Research. 2008.

Cita MLA

Tortello, Franco, et al. Trilobites From Vargas Peña (Llandovery) of Itaugúa, Eastern Paraguay: Advances in Trolobites Research. 2008.