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APA Citation
Ihle, A., Grotz, C., Adam, S., Oris, M., Fagot, D., Gabriel, R., & Kliegel, M. (n.d.). the association of timing of retirement with cognitive performance in old age: the role of leisure activities after retirement. International psychogeriatrics, 28, 1659–1669. http://access.bl.uk/ark:/81055/vdc_100037392030.0x000038