Dyfyniad APA
ebrary, Inc, Sheets, D. J., Bradley, D. B., & Hendricks, J. (2006). Enduring questions in gerontology. Springer Pub. Co..
Dyfyniad Arddull Chicago
ebrary, Inc, Debra J. Sheets, Dana Burr Bradley, and Jon Hendricks. Enduring Questions in Gerontology. New York: Springer Pub. Co., 2006.
Dyfyniad MLA
ebrary, Inc, et al. Enduring Questions in Gerontology. Springer Pub. Co., 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.