Flennert, M., König, H., & Hajek, A. (2019). The association between voluntary work and health care use among older adults in Germany. BMC.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFlennert, Maike, Hans-Helmut König, और André Hajek. The Association Between Voluntary Work and Health Care Use Among Older Adults in Germany. BMC, 2019.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFlennert, Maike, et al. The Association Between Voluntary Work and Health Care Use Among Older Adults in Germany. BMC, 2019.
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