(2007). Vision 2020: The Right to sight. International Agency for the Prevention of Blindness.
Cita Chicago (17th ed.)Vision 2020: The Right to Sight. India: International Agency for the Prevention of Blindness, 2007.
Cita MLA (9th ed.)Vision 2020: The Right to Sight. International Agency for the Prevention of Blindness, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.