Cita APA (7a ed.)

Baez, A., Trueb, L., & Calvo, J. The earliest known pipoid frog from South America: A new genus from the middle cretaceous of Argentina.

Cita Chicago Style (17a ed.)

Baez, A.M, L. Trueb, y J.O Calvo. The Earliest Known Pipoid Frog from South America: A New Genus from the Middle Cretaceous of Argentina.

Cita MLA (8a ed.)

Baez, A.M, et al. The Earliest Known Pipoid Frog from South America: A New Genus from the Middle Cretaceous of Argentina.