National Research Council Study Group on Environmental Monitoring, United States Environmental Protection Agency, & National Research Council Committee on National Statistics. (1977). Environmental monitoring: A report to the U.S. Environmental Protection Agency. National Academy of Sciences.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Research Council Study Group on Environmental Monitoring, United States Environmental Protection Agency, και National Research Council Committee on National Statistics. Environmental Monitoring: A Report to the U.S. Environmental Protection Agency. Washington: National Academy of Sciences, 1977.
Παραπομπή σε μορφή MLA (9th εκδ.)National Research Council Study Group on Environmental Monitoring, et al. Environmental Monitoring: A Report to the U.S. Environmental Protection Agency. National Academy of Sciences, 1977.