Cita APA (7a ed.)

Tonni, E. P., Cione, A. L., & Soibelzon, L. H. (2003). The Broken Zig-Zag: Late Cenozoic large mammal and tortoise extintion in South America.

Cita Chicago Style (17a ed.)

Tonni, Eduardo Pedro, Alberto Luis Cione, y Leopoldo Héctor Soibelzon. The Broken Zig-Zag: Late Cenozoic Large Mammal and Tortoise Extintion in South America. 2003.

Cita MLA (8a ed.)

Tonni, Eduardo Pedro, et al. The Broken Zig-Zag: Late Cenozoic Large Mammal and Tortoise Extintion in South America. 2003.