Luminosity, throughput, or etendue? Further comments.

MLA

Steel, W. H. “Luminosity, Throughput, or Etendue? Further Comments.” Applied Optics, vol. 14, no. 2, Feb. 1975, p. 252. EBSCOhost, https://doi.org/10.1364/AO.14.000252.

APA

Steel, W. H. (1975). Luminosity, throughput, or etendue? Further comments. Applied Optics, 14(2), 252. https://doi.org/10.1364/AO.14.000252

Chicago

Steel, W H. 1975. “Luminosity, Throughput, or Etendue? Further Comments.” Applied Optics 14 (2): 252. doi:10.1364/AO.14.000252.