APA
Johnson H.G, Economics - Concepts- analysis;Environmental policy;Science - Social Aspects;Social problems and s/welfare & Johnson H.G.Man and His Environment. London: .
Chicago
Johnson H.G, Economics - Concepts- analysis;Environmental policy;Science - Social Aspects;Social problems and s/welfare and Johnson H.G.Man and His Environment. London: .
Harvard
Johnson H.G, Economics - Concepts- analysis;Environmental policy;Science - Social Aspects;Social problems and s/welfare and Johnson H.G.Man and His Environment. London: .
MLA
Johnson H.G, Economics - Concepts- analysis;Environmental policy;Science - Social Aspects;Social problems and s/welfare and Johnson H.G.London: . .