Citazione Stile APA (7a Edizione)

Peterson, R. T., & Fisher, J. Wild america: The record of a 30,000 mile journey around the north american continent by an american naturalist and his british colleague.

Citazione stile Chigago Style (17a edizione)

Peterson, Roger Tory, e James Fisher. Wild America: The Record of a 30,000 Mile Journey Around the North American Continent by an American Naturalist and His British Colleague.

Citatione MLA (8a ed.)

Peterson, Roger Tory, e James Fisher. Wild America: The Record of a 30,000 Mile Journey Around the North American Continent by an American Naturalist and His British Colleague.