Walker, W. O. (1992). Drug control policy: Essays in historical and comparative perspective. Pennsylvania State Univ. Pr.
Chicago Style (17th ed.) CitationWalker, William O. Drug Control Policy: Essays in Historical and Comparative Perspective. University Park, Pa: Pennsylvania State Univ. Pr, 1992.
MLA (9th ed.) CitationWalker, William O. Drug Control Policy: Essays in Historical and Comparative Perspective. Pennsylvania State Univ. Pr, 1992.
Warning: These citations may not always be 100% accurate.