Dyfyniad APA

Moore, T. J. (1993). Lifespan: Who lives longer-- and why. Simon & Schuster.

Dyfyniad Arddull Chicago

Moore, Thomas J. Lifespan: Who Lives Longer-- and Why. New York: Simon & Schuster, 1993.

Dyfyniad MLA

Moore, Thomas J. Lifespan: Who Lives Longer-- and Why. Simon & Schuster, 1993.

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