Cita APA (7th ed.)
HARRISON, L. (1992). TRENDS IN ILLICIT DRUG USE IN THE UNITED STATES: CONFLICTING RESULTS FROM NATIONAL SURVEYS.
Cita Chicago (17th ed.)
HARRISON, L.D. TRENDS IN ILLICIT DRUG USE IN THE UNITED STATES: CONFLICTING RESULTS FROM NATIONAL SURVEYS. 1992.
Cita MLA (9th ed.)
HARRISON, L.D. TRENDS IN ILLICIT DRUG USE IN THE UNITED STATES: CONFLICTING RESULTS FROM NATIONAL SURVEYS. 1992.
Atenció: Aquestes cites poden no estar 100% correctes.