Smith, R. B. (2020). Multilevel Modeling of Social Problems. Springer Netherlands.
शिकागो स्टाइल उद्धरणSmith, Robert B. Multilevel Modeling of Social Problems. Springer Netherlands, 2020.
एमएलए उद्धरणSmith, Robert B. Multilevel Modeling of Social Problems. Springer Netherlands, 2020.
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