APA
Sorsby A., . (1972). Modern ophthalmology vol. IV. Butterworths, London: .
Chicago
Sorsby Arnold, . 1972. Modern ophthalmology vol. IV. Butterworths, London: .
Harvard
Sorsby A., . (1972). Modern ophthalmology vol. IV. Butterworths, London: .
MLA
Sorsby Arnold, . Modern ophthalmology vol. IV. Butterworths, London: . 1972.