Peterson, R. T. (1962). A field guide to the birds. U.S.A: Houghton Mifflin Company Boston.
Chicago Style CitationPeterson, Roger Tory. A Field Guide to the Birds. U.S.A: Houghton Mifflin Company Boston, 1962.
Cita MLAPeterson, Roger Tory. A Field Guide to the Birds. U.S.A: Houghton Mifflin Company Boston, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.