Dyfyniad APA

Cox, H. (2000). Aging (13th ed.). Dushkin/McGraw-Hill.

Dyfyniad Arddull Chicago

Cox, Harold. Aging. 13th ed. Guilford, Conn. :: Dushkin/McGraw-Hill, 2000.

Dyfyniad MLA

Cox, Harold. Aging. 13th ed. Dushkin/McGraw-Hill, 2000.

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