APA (7th ed.) Citation

Preda, L. (2014). Generation of optical vortices by fractional derivative. Optics & Lasers in Engineering, 54, 42. https://doi.org/10.1016/j.optlaseng.2013.09.013

Chicago Style (17th ed.) Citation

Preda, L. "Generation of Optical Vortices by Fractional Derivative." Optics & Lasers in Engineering 54 (2014): 42. https://doi.org/10.1016/j.optlaseng.2013.09.013.

MLA (9th ed.) Citation

Preda, L. "Generation of Optical Vortices by Fractional Derivative." Optics & Lasers in Engineering, vol. 54, 2014, p. 42, https://doi.org/10.1016/j.optlaseng.2013.09.013.