VaRG. (2008). Valley research group private limited (VaRG) general profile.
芝加哥风格引文VaRG. Valley Research Group Private Limited (VaRG) General Profile. 2008.
MLA引文VaRG. Valley Research Group Private Limited (VaRG) General Profile. 2008.
警告：这些引文格式不一定是100％准确.