Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.