APA (7th ed.) Citation

Bonifacio, P., Caffau, E., Sbordone, L., & Ludwig, H. (2011). Extremely metal-poor stars in SDSS fields. Astronomische Nachrichten, 332(3), . https://doi.org/10.1002/asna.201111528

Chicago Style (17th ed.) Citation

Bonifacio, Piercarlo, Elisabetta Caffau, Luca Sbordone, and Hans-Günter Ludwig. "Extremely Metal-poor Stars in SDSS Fields." Astronomische Nachrichten 332, no. 3 (2011). https://doi.org/10.1002/asna.201111528.

MLA (9th ed.) Citation

Bonifacio, Piercarlo, et al. "Extremely Metal-poor Stars in SDSS Fields." Astronomische Nachrichten, vol. 332, no. 3, 2011, https://doi.org/10.1002/asna.201111528.