Koshel, R. J. Design of Efficient Illumination Systems. SPIE Digital Library.
Cita Chicago (17th ed.)Koshel, R. John. Design of Efficient Illumination Systems. SPIE Digital Library.
Cita MLA (9th ed.)Koshel, R. John. Design of Efficient Illumination Systems. SPIE Digital Library.
Atenció: Aquestes cites poden no estar 100% correctes.