Business America. US Department of Commerce.
芝加哥风格引文Business America. US Department of Commerce.
MLA引文Business America. US Department of Commerce.
警告：这些引文格式不一定是100％准确.
APA引文
Business America. US Department of Commerce.
芝加哥风格引文Business America. US Department of Commerce.
MLA引文Business America. US Department of Commerce.