(1989). Praca i Zabezpieczenie Spoleczne. Wyd. Ekon.
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Citação norma Chicago
Praca I Zabezpieczenie Spoleczne. Warszawa: Wyd. Ekon, 1989.
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Citação norma MLA
Praca I Zabezpieczenie Spoleczne. Wyd. Ekon, 1989.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.