United States. Dept. of Agriculture. (1968). A national program of research for environmental quality: Pollution in relation to agriculture and forestry. s.n.
Цитирование в стиле Чикаго (17-е изд.)United States. Dept. of Agriculture. A National Program of Research for Environmental Quality: Pollution in Relation to Agriculture and Forestry. [Washington: s.n, 1968.
Цитирование MLA (8-е изд.)United States. Dept. of Agriculture. A National Program of Research for Environmental Quality: Pollution in Relation to Agriculture and Forestry. s.n, 1968.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.