开题报告中的参考文献格式可以采用国际通用的APA格式（American Psychological Association），下面是APA格式的范文示例：
参考文献：
[1] Smith, J. (2020). The impact of social media on mental health. Journal of Social Psychology, 45(2), 123-145.
[2] Johnson, A. & Brown, M. (2019). The role of parental influence on adolescent academic achievement. Educational Psychology Review, 36(4), 567-589.
[3] Park, S., Lee, H., & Kim, K. (2018). The effects of exercise on physical and mental health in middle-aged **s. Sports Medicine, 25(3), 201-223.
[4] Zhang, L., & Wang, C. (2017). The relationship between job satisfaction and employee performance: A meta-**ysis. Journal of Applied Psychology, 52(1), 78-95.
[5] Chen, X., Liu, H., & Li, Y. (2016). The impact of financial education on individual savings behavior. Journal of Consumer Economics, 38(2), 234-256.
请注意，以上范文仅是示例，实际应根据自己的研究领域和引用文献的具体情况进行适当的调整和修改。进行文献引用时，需要按照APA格式规定的要求填写文献的作者、发表年份、文章题目、期刊名称、卷号、期号，在参考文献列表中按照作者的姓氏字母顺序排列。