Citazione APA

Hartridge, G. (1898). The refraction of the eye: A manual for students (9th ed.). J. & A. Churchill.

Stile di citazione Chicago

Hartridge, Gustavus. The Refraction of the Eye: A Manual for Students. 9th ed. London: J. & A. Churchill, 1898.

Citazione MLA

Hartridge, Gustavus. The Refraction of the Eye: A Manual for Students. 9th ed. J. & A. Churchill, 1898.