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Chicago-čujuhus (17. p.)ebrary, Inc, juo Ping-Chung Leung. Healthy Aging. Hackensack, N.J.: World Scientific Pub. Co., 2011.
MLA-čujuhus (9. p.)ebrary, Inc, juo Ping-Chung Leung. Healthy Aging. World Scientific Pub. Co., 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.