Dyfyniad APA
Easterlin, R. A. (1998). Growth triumphant: The twenty-first century in historical perspective (1st pbk. ed.). University of Michigan Press.
Dyfyniad Arddull Chicago
Easterlin, Richard A. Growth Triumphant: The Twenty-first Century in Historical Perspective. 1st pbk. ed. Ann Arbor, Mich.: University of Michigan Press, 1998.
Dyfyniad MLA
Easterlin, Richard A. Growth Triumphant: The Twenty-first Century in Historical Perspective. 1st pbk. ed. University of Michigan Press, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.