Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Martínez, S., C.J Del Río, y A. Concheyro. Danian (Early Paleocene) Echinoids from the Roca Formation, Northern Patagonia, Argentina.

Cita MLA (8a ed.)

Martínez, S., et al. Danian (Early Paleocene) Echinoids from the Roca Formation, Northern Patagonia, Argentina.