Peterson, R. T. (1956). A fiels guide to the birds (2ª ed.). Houghton Miffin Company.
Citación estilo ChicagoPeterson, Roger Tory. A Fiels Guide to the Birds. 2ª ed. Houghton Miffin Company, 1956.
Cita MLAPeterson, Roger Tory. A Fiels Guide to the Birds. 2ª ed. Houghton Miffin Company, 1956.
Warning: These citations may not always be 100% accurate.