APA (7th ed.) Citation

Portigal, D. L., & Burstein, E. (1969). Internal conical refraction. Journal of the Optical Society of America, 59, 1567. https://doi.org/10.1364/JOSA.59.001567

Chicago Style (17th ed.) Citation

Portigal, D. L., and E. Burstein. "Internal Conical Refraction." Journal of the Optical Society of America 59 (1969): 1567. https://doi.org/10.1364/JOSA.59.001567.

MLA (9th ed.) Citation

Portigal, D. L., and E. Burstein. "Internal Conical Refraction." Journal of the Optical Society of America, vol. 59, 1969, p. 1567, https://doi.org/10.1364/JOSA.59.001567.