from competent sources

See: authentic
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References in periodicals archive ?
They said that those keen on accuracy in their reports should take their information only from competent sources.
It is important that the information comes from competent sources.
Furthermore, the participants recommended activating the role of technical, legal and media committees by making suggestions and conducting studies that will contribute in enhancing urban agricultural advancement in Amman and through looking for new methods to attain financial support from competent sources to sustain the project.