(1987). What works: Schools without drugs. United States Department of Education.
Chicago-Zitierstil (17. Ausg.)What Works: Schools Without Drugs. Washington, D.C: United States Department of Education, 1987.
MLA-Zitierstil (9. Ausg.)What Works: Schools Without Drugs. United States Department of Education, 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.