Dyfyniad APA

Barry, J. R., & Wingrove, C. R. (1977). Let's learn about aging: A book of readings. John Wiley.

Dyfyniad Arddull Chicago

Barry, John R., and C. Ray Wingrove. Let's Learn About Aging: A Book of Readings. New York: John Wiley, 1977.

Dyfyniad MLA

Barry, John R., and C. Ray Wingrove. Let's Learn About Aging: A Book of Readings. John Wiley, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.