International Commission on Illumination. Committee for Photometry. (1970). Principles of light measurements.
Citazione stile Chigago Style (17a edizione)International Commission on Illumination. Committee for Photometry. Principles of Light Measurements. Paris, 1970.
Citatione MLA (8a ed.)International Commission on Illumination. Committee for Photometry. Principles of Light Measurements. 1970.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.