ŚPIEWAK-SZYJKA, Monika.
 The elderly on the labour market.
<strong>Progress in Economic Sciences</strong>, [S.l.], n. 4, july 2017.
ISSN 2391-5951.
Available at: &lt;<a href="http://www.pes.pwsz.pila.pl/index.php/PES/article/view/123" target="_new">http://www.pes.pwsz.pila.pl/index.php/PES/article/view/123</a>&gt;. Date accessed: 19 aug. 2025.
doi: <a href="https://doi.org/10.14595/PES/04/021">https://doi.org/10.14595/PES/04/021</a>.