Cita APA (7a ed.)

Martínez Chiappara, S. A., Del Río, C., & Concheyro, G. A. (2011). Danian (Early Paleocene) echinoids from the Roca Formation, northern Patagonia, Argentina.

Cita Chicago Style (17a ed.)

Martínez Chiappara, Sergio Agustín, Claudia Del Río, y Graciela Andrea Concheyro. Danian (Early Paleocene) Echinoids from the Roca Formation, Northern Patagonia, Argentina. 2011.

Cita MLA (8a ed.)

Martínez Chiappara, Sergio Agustín, et al. Danian (Early Paleocene) Echinoids from the Roca Formation, Northern Patagonia, Argentina. 2011.