Scanlon, P. (2009). Stage R2: Moderate and Severe Non-Proliferative Diabetic Retinopathy (Preproliferative Diabetic Retinopathy).
Čikaški stil citiranja (17. izdanje)Scanlon, P. Stage R2: Moderate and Severe Non-Proliferative Diabetic Retinopathy (Preproliferative Diabetic Retinopathy). 2009.
MLA način citiranja (9. izdanje)Scanlon, P. Stage R2: Moderate and Severe Non-Proliferative Diabetic Retinopathy (Preproliferative Diabetic Retinopathy). 2009.
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