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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Peterson, Roger Tory, و 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Peterson, Roger Tory, و 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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.