Cita APA

Negrel, A., & Ellwein, L. B. (2000). More Research Needed to Assess the Magnitude of Refractive Errors World-wide. International Centre for Eye Health.

Chicago Style Citation

Negrel, Andre-Dominique, i Leon B. Ellwein. More Research Needed to Assess the Magnitude of Refractive Errors World-wide. International Centre for Eye Health, 2000.

Cita MLA

Negrel, Andre-Dominique, i Leon B. Ellwein. More Research Needed to Assess the Magnitude of Refractive Errors World-wide. International Centre for Eye Health, 2000.