Citace podle APA (7th ed.)
Duff, P., & et al. Sex-for-Crack exchanges: Associations with risky sexual and drug use niches in an urban Canadian city.
Citace podle Chicago (17th ed.)
Duff, P., a et al. Sex-for-Crack Exchanges: Associations with Risky Sexual and Drug Use Niches in an Urban Canadian City.
Citace podle MLA (9th ed.)
Duff, P., a et al. Sex-for-Crack Exchanges: Associations with Risky Sexual and Drug Use Niches in an Urban Canadian City.
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