Dyfyniad APA

 Darling, D. J. (2006).  Gravity’s arc: The story of gravity, from Aristotle to Einstein and beyond.  John Wiley & Sons.

Dyfyniad Arddull Chicago

 Darling, David J.  Gravity’s Arc: The Story of Gravity, From Aristotle to Einstein and Beyond.  John Wiley & Sons, 2006.

Dyfyniad MLA

 Darling, David J.  Gravity’s Arc: The Story of Gravity, From Aristotle to Einstein and Beyond.  John Wiley & Sons, 2006.

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