Peterson, R. T. (1962). A field guide to the birds. U.S.A: Houghton Mifflin Company Boston.
Trích dẫn kiểu ChicagoPeterson, Roger Tory. A Field Guide to the Birds. U.S.A: Houghton Mifflin Company Boston, 1962.
Deismireacht MLAPeterson, Roger Tory. A Field Guide to the Birds. U.S.A: Houghton Mifflin Company Boston, 1962.
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