Helms, R. N., & Belcher, M. C. (1991). Lighting for energy-efficient luminous environments ([Rev. ed.].). Prentice-Hall.
Chicago Style (17th ed.) CitationHelms, Ronald N., and M. Clay Belcher. Lighting for Energy-efficient Luminous Environments. [Rev. ed.]. Englewood Cliffs, N.J: Prentice-Hall, 1991.
MLA (9th ed.) CitationHelms, Ronald N., and M. Clay Belcher. Lighting for Energy-efficient Luminous Environments. [Rev. ed.]. Prentice-Hall, 1991.
Warning: These citations may not always be 100% accurate.