SpringerLink (Online service), Kohlbacher, F., & Herstatt, C. (2008). The Silver Market Phenomenon: Business Opportunities in an Era of Demographic Change. Springer Berlin Heidelberg.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Florian Kohlbacher, και Cornelius Herstatt. The Silver Market Phenomenon: Business Opportunities in an Era of Demographic Change. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. The Silver Market Phenomenon: Business Opportunities in an Era of Demographic Change. Springer Berlin Heidelberg, 2008.
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