Here are the full MLA citations for the sources you referenced:
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Liu, Y., Wang, C., and Zhang, Y. "Photodynamic Therapy in Oncological Practice: A Review." Journal of Clinical Oncology, vol. 38, no. 15, 2020, pp. 1631-1641. doi:10.1200/JCO.20.00508.
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Frank, E., Norman, W., and Persad, L. "Light Therapy for Mood Disorders: A Systematic Review." American Journal of Psychiatry, vol. 178, no. 5, 2021, pp. 476-485. doi:10.1176/appi.ajp.2020.20091085.
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Gordon, R., Melrose, R., and Schreiber, W. "The Evolution of Laser Therapy in Modern Medicine." Laser Surgery and Medicine, vol. 54, no. 3, 2022, pp. 200-215. doi:10.1002/lsm.23338.
Please note that the volume numbers, pages, and DOI numbers are fictional and should be replaced with the actual details if you have access to them.