APA Citatie

Longrich, N. R., Tokaryk, T., & Field, D. J. (2011). Mass extinction of birds at the Cretaceous–Paleogene (K–Pg) boundary. National Academy of Sciences.

Chicago Style citaat

Longrich, Nicholas R., Tim Tokaryk, en Daniel J. Field. Mass Extinction of Birds At the Cretaceous–Paleogene (K–Pg) Boundary. National Academy of Sciences, 2011.

MLA citatie

Longrich, Nicholas R., Tim Tokaryk, en Daniel J. Field. Mass Extinction of Birds At the Cretaceous–Paleogene (K–Pg) Boundary. National Academy of Sciences, 2011.