Facts on File, Inc, & International Union for Conservation of Nature and Natural Resources. (1994). Masterworks of man & nature (2nd ed.). Facts on File.
Citace podle Chicago (17th ed.)Facts on File, Inc, a International Union for Conservation of Nature and Natural Resources. Masterworks of Man & Nature. 2nd ed. New York: Facts on File, 1994.
Citace podle MLA (9th ed.)Facts on File, Inc, a International Union for Conservation of Nature and Natural Resources. Masterworks of Man & Nature. 2nd ed. Facts on File, 1994.
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