APA (7th ed.) Citation

Koch-Hansen, A., & McWilliam, A. (2011). A differential chemical element analysis of the metal-poor globular cluster NGC 6397. The astronomical journal, 142(2), .

Chicago Style (17th ed.) Citation

Koch-Hansen, Andreas, and Andrew McWilliam. "A Differential Chemical Element Analysis of the Metal-poor Globular Cluster NGC 6397." The Astronomical Journal 142, no. 2 (2011).

MLA (9th ed.) Citation

Koch-Hansen, Andreas, and Andrew McWilliam. "A Differential Chemical Element Analysis of the Metal-poor Globular Cluster NGC 6397." The Astronomical Journal, vol. 142, no. 2, 2011.