United States. General Accounting Office, ebrary, Inc, & Vellios, B. T. (2009). Environmental Protection Agency library network. Nova Science Publishers.
Citace podle Chicago (17th ed.)United States. General Accounting Office, Inc ebrary, a Bernard T. Vellios. Environmental Protection Agency Library Network. Hauppauge, N.Y.: Nova Science Publishers, 2009.
Citace podle MLA (9th ed.)United States. General Accounting Office, et al. Environmental Protection Agency Library Network. Nova Science Publishers, 2009.
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