(2000). Report on In-Class Variables: Fall 1987 & Fall 1992. U.S. Department of Education.
Citazione stile Chigago Style (17a edizione)Report on In-Class Variables: Fall 1987 & Fall 1992. U.S. Department of Education, 2000.
Citatione MLA (9a ed.)Report on In-Class Variables: Fall 1987 & Fall 1992. U.S. Department of Education, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.