APA (7th ed.) Citation

Cerda, I. A., Tambussi, C. P., & Degrange, F. J. Unexpected microanatomical variation among Eocene Antarctic stem penguins (Aves: Sphenisciformes). Historical Biology, 27(5), 549.

Chicago Style (17th ed.) Citation

Cerda, Ignacio Alejandro, Claudia Patricia Tambussi, and Federico Javier Degrange. "Unexpected Microanatomical Variation Among Eocene Antarctic Stem Penguins (Aves: Sphenisciformes)." Historical Biology 27, no. 5 (): 549.

MLA (9th ed.) Citation

Cerda, Ignacio Alejandro, et al. "Unexpected Microanatomical Variation Among Eocene Antarctic Stem Penguins (Aves: Sphenisciformes)." Historical Biology, vol. 27, no. 5, , p. 549.