APA (7th ed.) Citation

Ahmed, M. S., & Ley, J. M. (1972). Construction and evaluation of a three-stage electrically tunable colour filter. Journal of Physics. E, Scientific Instruments., 5, 226.

Chicago Style (17th ed.) Citation

Ahmed, M. S., and J. M. Ley. "Construction and Evaluation of a Three-stage Electrically Tunable Colour Filter." Journal of Physics. E, Scientific Instruments. 5 (1972): 226.

MLA (9th ed.) Citation

Ahmed, M. S., and J. M. Ley. "Construction and Evaluation of a Three-stage Electrically Tunable Colour Filter." Journal of Physics. E, Scientific Instruments., vol. 5, 1972, p. 226.