APA (7th ed.) Citation

Koch-Hansen, A., & Grebel, E. K. (2008). The highly unusual chemical composition of the Hercules dwarf spheroidal galaxy. The astrophysical journal. Part 2, Letters, 688(2), . https://doi.org/10.1086/595001

Chicago Style (17th ed.) Citation

Koch-Hansen, Andreas, and Eva K. Grebel. "The Highly Unusual Chemical Composition of the Hercules Dwarf Spheroidal Galaxy." The Astrophysical Journal. Part 2, Letters 688, no. 2 (2008). https://doi.org/10.1086/595001.

MLA (9th ed.) Citation

Koch-Hansen, Andreas, and Eva K. Grebel. "The Highly Unusual Chemical Composition of the Hercules Dwarf Spheroidal Galaxy." The Astrophysical Journal. Part 2, Letters, vol. 688, no. 2, 2008, https://doi.org/10.1086/595001.