United States. Department of Education. (1986). What works: Research about teaching and learning. U.S. Dept. of Education.
芝加哥风格引文United States. Department of Education. What Works: Research About Teaching and Learning. Washington, D.C.: U.S. Dept. of Education, 1986.
MLA引文United States. Department of Education. What Works: Research About Teaching and Learning. U.S. Dept. of Education, 1986.
警告：这些引文格式不一定是100％准确.