APA ציטוט

Gilbert, M., & Hopkinson, R. G. (1949). THE ILLUMINATION OF THE SNELLEN CHART.

Citação norma Chicago

Gilbert, M., and R. G. Hopkinson. THE ILLUMINATION OF THE SNELLEN CHART. 1949.

ציטוט MLA

Gilbert, M., and R. G. Hopkinson. THE ILLUMINATION OF THE SNELLEN CHART. 1949.