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I'm already using the \citep{} and citet{}. The \usepackage[authoryear]{natbib} does not work...

Hello,
I'm doing a work by chapters with references in the end of all.
I included "\usepackage{natbib}" and "\usepackage{apalike}" in the preamble of the main document (the chapters are into folders) but the references appear with a number (e.g.)(6) instead of (Author,year).
Can anyone please help ...