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Fekrat S, Emerson GG, Harlan Jr. JB, Lutty GA, Goldberg MF. Sickle cell retinopathy. In: Ryan SJ, Murphy R, Schachat AP, editors. Retina. Philadelphia: Elsevier Inc.; 2006. p. 1429–45.

Fekrat, S., et al. “Sickle cell retinopathy.” Retina, edited by S. J. Ryan et al., Elsevier Inc., 2006, pp. 1429–45.

Fekrat S, Emerson GG, Harlan Jr. JB, Lutty GA, Goldberg MF. Sickle cell retinopathy. In: Ryan SJ, Murphy R, Schachat AP, editors. Retina. Philadelphia: Elsevier Inc.; 2006. p. 1429–1445.