Cita APA (7a ed.)

O’Connor, J., Erickson, G. M., Norell, M., Bailleul, A. M., Hu, H., & Zhou, Z. (2018). Medullary bone in an Early Cretaceous enantiornithine bird and discussion regarding its identification in fossils. Nature Portfolio.

Cita Chicago Style (17a ed.)

O’Connor, Jingmai, Gregory M. Erickson, Mark Norell, Alida M. Bailleul, Han Hu, y Zhonghe Zhou. Medullary Bone in an Early Cretaceous Enantiornithine Bird and Discussion Regarding Its Identification in Fossils. Nature Portfolio, 2018.

Cita MLA (8a ed.)

O’Connor, Jingmai, et al. Medullary Bone in an Early Cretaceous Enantiornithine Bird and Discussion Regarding Its Identification in Fossils. Nature Portfolio, 2018.