APA (7th ed.) Citation

Sugar, J., & Macsai, M. S. (2012). What causes keratoconus? Cornea, 31(6), 716. https://doi.org/10.1097/ICO.0b013e31823f8c72

Chicago Style (17th ed.) Citation

Sugar, Joel, and Marian S. Macsai. "What Causes Keratoconus?" Cornea 31, no. 6 (2012): 716. https://doi.org/10.1097/ICO.0b013e31823f8c72.

MLA (9th ed.) Citation

Sugar, Joel, and Marian S. Macsai. "What Causes Keratoconus?" Cornea, vol. 31, no. 6, 2012, p. 716, https://doi.org/10.1097/ICO.0b013e31823f8c72.

Warning: These citations may not always be 100% accurate.