APA
Marshall E. T., . (1975). Study on synthetic versus natural products: Pilot project on the rubber industry and its impact on environment. UNIDO: .
Chicago
Marshall E T, . 1975. Study on synthetic versus natural products: Pilot project on the rubber industry and its impact on environment. UNIDO: .
Harvard
Marshall E. T., . (1975). Study on synthetic versus natural products: Pilot project on the rubber industry and its impact on environment. UNIDO: .
MLA
Marshall E T, . Study on synthetic versus natural products: Pilot project on the rubber industry and its impact on environment. UNIDO: . 1975.