APA
Ridker R. G., Watson W. D., . (1980). To choose a future: Resource and environmental consequences. Baltimore: Jhons Hopkins Univ Pr.
Chicago
Ridker Ronald G, Watson William D, . 1980. To choose a future: Resource and environmental consequences. Baltimore: Jhons Hopkins Univ Pr.
Harvard
Ridker R. G., Watson W. D., . (1980). To choose a future: Resource and environmental consequences. Baltimore: Jhons Hopkins Univ Pr.
MLA
Ridker Ronald G, Watson William D, . To choose a future: Resource and environmental consequences. Baltimore: Jhons Hopkins Univ Pr. 1980.