Xu, L., You, Q., & Jonas, J. B. (2010). Refractive error, ocular and general parameters and ophthalmic diseases: The Beijing Eye Study. Graefe's archive for clinical and experimental ophthalmology, 248(5), . https://doi.org/10.1007/s00417-009-1233-0
Chicago Style (17th ed.) CitationXu, Liang, Qisheng You, and Jost B. Jonas. "Refractive Error, Ocular and General Parameters and Ophthalmic Diseases: The Beijing Eye Study." Graefe's Archive for Clinical and Experimental Ophthalmology 248, no. 5 (2010). https://doi.org/10.1007/s00417-009-1233-0.
MLA (9th ed.) CitationXu, Liang, et al. "Refractive Error, Ocular and General Parameters and Ophthalmic Diseases: The Beijing Eye Study." Graefe's Archive for Clinical and Experimental Ophthalmology, vol. 248, no. 5, 2010, https://doi.org/10.1007/s00417-009-1233-0.