Coombs, R. H. (1991). Drug testing: Issues and options. Oxford Univ. Press.
Chicago Style (17th ed.) CitationCoombs, Robert H. Drug Testing: Issues and Options. New York [u.a.]: Oxford Univ. Press, 1991.
MLA (8th ed.) CitationCoombs, Robert H. Drug Testing: Issues and Options. Oxford Univ. Press, 1991.
Warning: These citations may not always be 100% accurate.