Cita APA

National Academy of Sciences. (1961). Principles of resource conservation policy. Whashington: [s.n.].

Citación estilo Chicago

National Academy of Sciences. Principles of Resource Conservation Policy. Whashington: [s.n.], 1961.

Cita MLA

National Academy of Sciences. Principles of Resource Conservation Policy. Whashington: [s.n.], 1961.

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