APA (7th ed.) Citation

Packer, D. M., & Lock, C. (1951). Brightness and polarization of the daylight sky at altitudes of 18,000 to 38,000 feet above sea level. Journal of the Optical Society of America, 41, 473. https://doi.org/10.1364/JOSA.41.000473

Chicago Style (17th ed.) Citation

Packer, D. M., and C. Lock. "Brightness and Polarization of the Daylight Sky at Altitudes of 18,000 to 38,000 Feet Above Sea Level." Journal of the Optical Society of America 41 (1951): 473. https://doi.org/10.1364/JOSA.41.000473.

MLA (9th ed.) Citation

Packer, D. M., and C. Lock. "Brightness and Polarization of the Daylight Sky at Altitudes of 18,000 to 38,000 Feet Above Sea Level." Journal of the Optical Society of America, vol. 41, 1951, p. 473, https://doi.org/10.1364/JOSA.41.000473.