(2000). Students Who Reported it Would be Easy to Get Drugs: 1992-98. U.S. Department of Education.
Chicago-viite (17. p.)Students Who Reported It Would Be Easy to Get Drugs: 1992-98. U.S. Department of Education, 2000.
MLA-viite (9. p.)Students Who Reported It Would Be Easy to Get Drugs: 1992-98. U.S. Department of Education, 2000.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.