APA-ийн эшлэл(7 дахь хэвлэлт)

United States. Department of Agriculture. Economic Research Service. (1994). Agricultural resources and environmental indicators. The Service.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

United States. Department of Agriculture. Economic Research Service. Agricultural Resources and Environmental Indicators. Washington, DC: The Service, 1994.

MLA -ийн эшлэл (9 дэх хэвлэлт)

United States. Department of Agriculture. Economic Research Service. Agricultural Resources and Environmental Indicators. The Service, 1994.

Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.