APA

United States, . (19). Production of sugarcane and tropical grasses as a renewable energy source. [Washington, D.C: .

Chicago

United States, . 19. Production of sugarcane and tropical grasses as a renewable energy source. [Washington, D.C: .

Harvard

United States, . (19). Production of sugarcane and tropical grasses as a renewable energy source. [Washington, D.C: .

MLA

United States, . Production of sugarcane and tropical grasses as a renewable energy source. [Washington, D.C: . 19.