Dyfyniad APA

 Jay, S. (2009).  Rules of Thumb: A Guide for Writers.  Mc Graw Hill Higher Education.

Dyfyniad Arddull Chicago

 Jay, Silverman.  Rules of Thumb: A Guide for Writers.  Mc Graw Hill Higher Education, 2009.

Dyfyniad MLA

 Jay, Silverman.  Rules of Thumb: A Guide for Writers.  Mc Graw Hill Higher Education, 2009.

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