Cita APA (7a ed.)

Urrets-Zavalia, A. (1977). Diabetic retinopathy. Masson.

Cita Chicago Style (17a ed.)

Urrets-Zavalia, Alberto. Diabetic Retinopathy. Paris [etc.]: Masson, 1977.

Cita MLA (9a ed.)

Urrets-Zavalia, Alberto. Diabetic Retinopathy. Masson, 1977.