Howard-Williams, J., Peckar, C., Holman, R., Turner, R., & Bron, A. (1986). Quantifying early diabetic retinopathy. Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)Howard-Williams, JR, C. Peckar, R. Holman, R. Turner, agus A. Bron. Quantifying Early Diabetic Retinopathy. Springer-Verlag, 1986.
Lua MLA (9ú heag.)Howard-Williams, JR, et al. Quantifying Early Diabetic Retinopathy. Springer-Verlag, 1986.
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