APA (7th ed.) Citation

Knill, D. C., Mamassian, P., & Kersten, D. (1997). Geometry of shadows. Journal of the Optical Society of America. A, Optics, Image Science, & Vision, 14, 3216. https://doi.org/10.1364/JOSAA.14.003216

Chicago Style (17th ed.) Citation

Knill, David C., Pascal Mamassian, and Daniel Kersten. "Geometry of Shadows." Journal of the Optical Society of America. A, Optics, Image Science, & Vision 14 (1997): 3216. https://doi.org/10.1364/JOSAA.14.003216.

MLA (9th ed.) Citation

Knill, David C., et al. "Geometry of Shadows." Journal of the Optical Society of America. A, Optics, Image Science, & Vision, vol. 14, 1997, p. 3216, https://doi.org/10.1364/JOSAA.14.003216.