Não informado. (1920). Journal of the Institute of Personnel Management. Institute of Personnel Management.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Journal of the Institute of Personnel Management. London: Institute of Personnel Management, 1920.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Journal of the Institute of Personnel Management. Institute of Personnel Management, 1920.
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