National Research Council (U.S.). Committee on Agricultural Land Use and Wildlife Resources & United States. Department of Agriculture. (1970). Land use and wildlife resources. National Academy of Sciences.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)National Research Council (U.S.). Committee on Agricultural Land Use and Wildlife Resources ба United States. Department of Agriculture. Land Use and Wildlife Resources. Washington: National Academy of Sciences, 1970.
MLA -ийн эшлэл (9 дэх хэвлэлт)National Research Council (U.S.). Committee on Agricultural Land Use and Wildlife Resources ба United States. Department of Agriculture. Land Use and Wildlife Resources. National Academy of Sciences, 1970.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.