APA
Grapendaal M., Leuw E. & Nelen H. (1995). A world of opportunities : life-style and economic behavior of heroin addicts in Amsterdam. Albany: State University of New York.
Chicago
Grapendaal Martin, Leuw Ed and Nelen Hans. 1995. A world of opportunities : life-style and economic behavior of heroin addicts in Amsterdam. Albany: State University of New York.
Harvard
Grapendaal M., Leuw E. and Nelen H. (1995). A world of opportunities : life-style and economic behavior of heroin addicts in Amsterdam. Albany: State University of New York.
MLA
Grapendaal Martin, Leuw Ed and Nelen Hans. A world of opportunities : life-style and economic behavior of heroin addicts in Amsterdam. Albany: State University of New York. 1995.
BOEKEN/BROCHURES