PETERSON, R. T. [. (1970). The birds. Time-Life Books.
Lua i Stíl Chicago (17ú heag.)PETERSON, Roger Tory [ed.]. The Birds. New York: Time-Life Books, 1970.
Lua MLA (9ú heag.)PETERSON, Roger Tory [ed.]. The Birds. Time-Life Books, 1970.
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