MLA

Keitz, H.A.E. Philips Technical Library; Light Calculations and Measurements; an Introduction to the System of Quantities and Units In Light-technology and to Photometry. London: Macmillan and Co, 1971.

APA

Keitz, H. (1971). Philips technical library; light calculations and measurements; an introduction to the system of quantities and units in light-technology and to photometry. London: Macmillan and Co.

Chicago

Keitz, H.A.E. Philips Technical Library; Light Calculations and Measurements; an Introduction to the System of Quantities and Units In Light-Technology and to Photometry. London: Macmillan and Co, 1971.