APA (7th ed.) Citation

Girardi, L., & Grebel, E. K. (2004). Theoretical isochrones in several photometric systems: II. The Sloan Digital Sky Survey ugriz system. Astronomy and astrophysics, 422(1), . https://doi.org/10.1051/0004-6361:20040250

Chicago Style (17th ed.) Citation

Girardi, Léo, and Eva K. Grebel. "Theoretical Isochrones in Several Photometric Systems: II. The Sloan Digital Sky Survey Ugriz System." Astronomy and Astrophysics 422, no. 1 (2004). https://doi.org/10.1051/0004-6361:20040250.

MLA (9th ed.) Citation

Girardi, Léo, and Eva K. Grebel. "Theoretical Isochrones in Several Photometric Systems: II. The Sloan Digital Sky Survey Ugriz System." Astronomy and Astrophysics, vol. 422, no. 1, 2004, https://doi.org/10.1051/0004-6361:20040250.