Cita APA

Liu, W., & Sharma, S. (2005). Gradual loss of vision. College of Family Physicians of Canada.

Citación estilo Chicago

Liu, Wei, y Sanjay Sharma. Gradual Loss of Vision. College of Family Physicians of Canada, 2005.

Cita MLA

Liu, Wei, y Sanjay Sharma. Gradual Loss of Vision. College of Family Physicians of Canada, 2005.