APA (7th ed.) Citation

MARRA, A. C., & Marra, A. C. (2002). Ursus arctos from selected sites of eastern Sicily.

Chicago Style (17th ed.) Citation

MARRA, Antonella Cinzia, and Antonella Cinzia Marra. Ursus Arctos from Selected Sites of Eastern Sicily. 2002.

MLA (9th ed.) Citation

MARRA, Antonella Cinzia, and Antonella Cinzia Marra. Ursus Arctos from Selected Sites of Eastern Sicily. 2002.

Warning: These citations may not always be 100% accurate.