APA (7th ed.) Citation

Guo, Y., & Jonas, J. B. (2013). Outdoor activity and myopia among primary students in rural and urban regions of Beijing. Ophthalmology, 120(2), .

Chicago Style (17th ed.) Citation

Guo, Yin, and Jost B. Jonas. "Outdoor Activity and Myopia Among Primary Students in Rural and Urban Regions of Beijing." Ophthalmology 120, no. 2 (2013).

MLA (9th ed.) Citation

Guo, Yin, and Jost B. Jonas. "Outdoor Activity and Myopia Among Primary Students in Rural and Urban Regions of Beijing." Ophthalmology, vol. 120, no. 2, 2013.