Gaya APA

Academics, I, O, M, O, T, N. (2007). Preventing HIV infection among injecting drug users in high-risk countries : an assessment of the evidence . Washington: The National Academics Press.

Gaya MLA

Academics, Institute, Of, Medicine, Of, The, National. "Preventing HIV infection among injecting drug users in high-risk countries : an assessment of the evidence". Washington: The National Academics Press, 2007. Text.