def list(self, **params):
        """
        Retrieve all sources

        Returns all deal sources available to the user according to the parameters provided

        :calls: ``get /sources``
        :param dict params: (optional) Search options.
        :return: List of dictionaries that support attriubte-style access, which represent collection of Sources.
        :rtype: list
        """

        _, _, sources = self.http_client.get("/sources", params=params)
        return sources