APA
Amaral J., . (1973). Improving water quality management planning in nonmetropolitan areas. U.S. Environmental Protection Agency (EPA): Washington.
Chicago
Amaral J, . 1973. Improving water quality management planning in nonmetropolitan areas. U.S. Environmental Protection Agency (EPA): Washington.
Harvard
Amaral J., . (1973). Improving water quality management planning in nonmetropolitan areas. U.S. Environmental Protection Agency (EPA): Washington.
MLA
Amaral J, . Improving water quality management planning in nonmetropolitan areas. U.S. Environmental Protection Agency (EPA): Washington. 1973.