United States. General Accounting Office, ebrary, Inc, & Vellios, B. T. (2009). Environmental Protection Agency library network. Nova Science Publishers.
芝加哥风格引文United States. General Accounting Office, Inc ebrary, 与 Bernard T. Vellios. Environmental Protection Agency Library Network. Hauppauge, N.Y.: Nova Science Publishers, 2009.
MLA引文United States. General Accounting Office, et al. Environmental Protection Agency Library Network. Nova Science Publishers, 2009.
警告：这些引文格式不一定是100％准确.