Cita APA (7a ed.)

(2000). Percentage of Students Using Drugs During the Previous 30 Days: 1991-98. U.S. Department of Education.

Cita Chicago Style (17a ed.)

Percentage of Students Using Drugs During the Previous 30 Days: 1991-98. U.S. Department of Education, 2000.

Cita MLA (8a ed.)

Percentage of Students Using Drugs During the Previous 30 Days: 1991-98. U.S. Department of Education, 2000.