APA (7th ed.) Citation

Sadda, S. R., Wiedemann, P., & Schachat, A. P. (2018). Ryan's retina (Sixth edition.). Elsevier.

Chicago Style (17th ed.) Citation

Sadda, SriniVas R., Peter Wiedemann, and Andrew P. Schachat. Ryan's Retina. Sixth edition. Edinburgh ; London ; New York: Elsevier, 2018.

MLA (9th ed.) Citation

Sadda, SriniVas R., et al. Ryan's Retina. Sixth edition. Elsevier, 2018.