Randall, B. (1987). Drug testing for illegal substances. Congressional Research Service, the Library of Congress.
Chicago-Zitierstil (17. Ausg.)Randall, Blanchard. "Drug Testing for Illegal Substances." Congressional Research Service, the Library of Congress 1987.
MLA-Zitierstil (8. Ausg.)Randall, Blanchard. "Drug Testing for Illegal Substances." Congressional Research Service, the Library of Congress, 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.