APA (7th ed.) Citation

Somma, G. D., Marconi, M., Ripepi, V., Cassisi, S., Molinaro, R., Musella, I., . . . Trentin, E. Spatial Age Distribution of Classical Cepheids in Spiral Galaxies: The Cases of M31 and M33. IOP Publishing.

Chicago Style (17th ed.) Citation

Somma, Giulia De, Marcella Marconi, Vincenzo Ripepi, Santi Cassisi, Roberto Molinaro, Ilaria Musella, Teresa Sicignano, and Erasmo Trentin. Spatial Age Distribution of Classical Cepheids in Spiral Galaxies: The Cases of M31 and M33. IOP Publishing.

MLA (9th ed.) Citation

Somma, Giulia De, et al. Spatial Age Distribution of Classical Cepheids in Spiral Galaxies: The Cases of M31 and M33. IOP Publishing.