Dyfyniad APA

Prehoda, R. W. (1968). Extended youth: The promise of gerontology. G.P. Putnam's Sons.

Dyfyniad Arddull Chicago

Prehoda, Robert W. Extended Youth: The Promise of Gerontology. New York: G.P. Putnam's Sons, 1968.

Dyfyniad MLA

Prehoda, Robert W. Extended Youth: The Promise of Gerontology. G.P. Putnam's Sons, 1968.

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