研究人员在提出论点时必须引用可靠的资料来源。
Researchers must ___cite reliable sources when presenting an argument.
作者没有引用那些质疑其结论的早期研究。
The authors failed to ___cite earlier studies that challenged their conclusion.
为了支持这一主张,报告应当引用来自多个地区的数据。
To support this claim, the report should ___cite data from multiple regions.