Roy, F. H., Pine, J., Bush, S. M., Boyce, T., & Jenny, C. (2002). Ocular differential diagnosis (Seventh edition.). Lippincott Williams & Wilkins.

Roy, Frederick Hampton, Jonathan Pine, Selina M. Bush, Thomas Boyce, and Christine Jenny. Ocular Differential Diagnosis. Seventh edition. Philadelphia, Pennsylvania: Lippincott Williams & Wilkins, 2002.

Roy, Frederick Hampton, et al. Ocular Differential Diagnosis. Seventh edition. Lippincott Williams & Wilkins, 2002.