APA-ийн эшлэл(7 дахь хэвлэлт)
United States. Department of Education. (1986). What works: Research about teaching and learning. U.S. Dept. of Education.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
United States. Department of Education. What Works: Research About Teaching and Learning. Washington, D.C.: U.S. Dept. of Education, 1986.
MLA -ийн эшлэл (9 дэх хэвлэлт)
United States. Department of Education. What Works: Research About Teaching and Learning. U.S. Dept. of Education, 1986.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.