APA استشهاد

Mao, J., Gao, X., Yan, P., Ren, X., Guan, Y., & Yan, Y. (2021). Impact of the COVID-19 pandemic on the mental health and learning of college and university students: A protocol of systematic review and meta-analysis. BMJ Open.

استشهاد بنمط شيكاغو

Mao, Jing, Xin Gao, Peireng Yan, Xiaocao Ren, Yong Guan, و Yi Yan. "Impact of the COVID-19 Pandemic On the Mental Health and Learning of College and University Students: A Protocol of Systematic Review and Meta-analysis." BMJ Open 2021.

MLA استشهاد

Mao, Jing, et al. "Impact of the COVID-19 Pandemic On the Mental Health and Learning of College and University Students: A Protocol of Systematic Review and Meta-analysis." BMJ Open 2021.

تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.