APA (7th ed.) Citation

Guerra, F., Leone, M., & Robotti, N. (2012). The discovery of artificial radioactivity.

Chicago Style (17th ed.) Citation

Guerra, Francesco, Matteo Leone, and Nadia Robotti. The Discovery of Artificial Radioactivity. 2012.

MLA (9th ed.) Citation

Guerra, Francesco, et al. The Discovery of Artificial Radioactivity. 2012.