Dyfyniad APA

Valerio, A. L., & Laurito, C. A. (2011). First record of fossil birds (Pelecaniformes: Pelecanidae and a probably Odontopterygiformes: Pelagornithidae) from the Upper Miocene of Costa Rica.

Dyfyniad Arddull Chicago

Valerio, Ana L., y César A. Laurito. First Record of Fossil Birds (Pelecaniformes: Pelecanidae and a Probably Odontopterygiformes: Pelagornithidae) From the Upper Miocene of Costa Rica. 2011.

Dyfyniad MLA

Valerio, Ana L., y César A. Laurito. First Record of Fossil Birds (Pelecaniformes: Pelecanidae and a Probably Odontopterygiformes: Pelagornithidae) From the Upper Miocene of Costa Rica. 2011.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.