United States. Environmental Protection Agency, Office of Research and Development, Gass, S. I., & Sisson, R. L. (1975). A Guide to models in governmental planning and operations. Sauger Books.
Citace podle Chicago (17th ed.)United States. Environmental Protection Agency, Office of Research and Development, Saul I. Gass, a Roger L. Sisson. A Guide to Models in Governmental Planning and Operations. Potomac, Md: Sauger Books, 1975.
Citace podle MLA (9th ed.)United States. Environmental Protection Agency, et al. A Guide to Models in Governmental Planning and Operations. Sauger Books, 1975.
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