Willoughby, W. W. (1925). Opium as an international problem, the Geneva conferences. John Hopkins Press.
Chicago Style (17th ed.) CitationWilloughby, Westel Woodbury. Opium as an International Problem, the Geneva Conferences. Baltimore: John Hopkins Press, 1925.
MLA (9th ed.) CitationWilloughby, Westel Woodbury. Opium as an International Problem, the Geneva Conferences. John Hopkins Press, 1925.
Warning: These citations may not always be 100% accurate.