Citace podle APA
Peterson, R. T., & Peterson, V. M. (1987). A field guide to the birds: A completely new guide to all the birds of Eastern and Central North America (4. vyd.). Boston: Houghton Mifflin Company.
Styl ChicagoPeterson, Roger Tory, and Virginia Marie Peterson. A Field Guide to the Birds: A Completely New Guide to All the Birds of Eastern and Central North America. 4. vyd. Boston: Houghton Mifflin Company, 1987.
Citace podle MLAPeterson, Roger Tory, and Virginia Marie Peterson. A Field Guide to the Birds: A Completely New Guide to All the Birds of Eastern and Central North America. 4. vyd. Boston: Houghton Mifflin Company, 1987.
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