United States. Government Accountability Office, United States. Congress. House. Committee on Natural Resources. Subcommittee on Fisheries, Wildlife, and Oceans, ebrary, Inc, & Taylor, E. B. (2010). Wildlife refuges: Factors and concerns about future sustainability. Nova Science Publishers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Government Accountability Office, Wildlife United States. Congress. House. Committee on Natural Resources. Subcommittee on Fisheries, Inc ebrary, و Earl B. Taylor. Wildlife Refuges: Factors and Concerns About Future Sustainability. New York: Nova Science Publishers, 2010.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United States. Government Accountability Office, et al. Wildlife Refuges: Factors and Concerns About Future Sustainability. Nova Science Publishers, 2010.