APA (7th ed.) Citation

Hassaballah, M., & Aly, S. (2015). Face recognition: Challenges, achievements and future directions. IET computer vision, 9(4), 614-626. https://doi.org/10.1049/iet-cvi.2014.0084

Chicago Style (17th ed.) Citation

Hassaballah, M., and Saleh Aly. "Face Recognition: Challenges, Achievements and Future Directions." IET Computer Vision 9, no. 4 (2015): 614-626. https://doi.org/10.1049/iet-cvi.2014.0084.

MLA (9th ed.) Citation

Hassaballah, M., and Saleh Aly. "Face Recognition: Challenges, Achievements and Future Directions." IET Computer Vision, vol. 9, no. 4, 2015, pp. 614-626, https://doi.org/10.1049/iet-cvi.2014.0084.