APA (7th ed.) Citation

Cohen, J. G., & Christlieb, N. (2007). A new type of extremely metal-poor star. The astrophysical journal. Part 2, Letters, 659(1), . https://doi.org/10.1086/518031

Chicago Style (17th ed.) Citation

Cohen, Judith G., and Norbert Christlieb. "A New Type of Extremely Metal-poor Star." The Astrophysical Journal. Part 2, Letters 659, no. 1 (2007). https://doi.org/10.1086/518031.

MLA (9th ed.) Citation

Cohen, Judith G., and Norbert Christlieb. "A New Type of Extremely Metal-poor Star." The Astrophysical Journal. Part 2, Letters, vol. 659, no. 1, 2007, https://doi.org/10.1086/518031.