Dyfyniad APA

 Moore, R. (2013).  Understanding Galápagos: What you''ll see and what it means.  McGraw-Hill.

Dyfyniad Arddull Chicago

 Moore, Randy.  Understanding Galápagos: What You''ll See and What It Means.  McGraw-Hill, 2013.

Dyfyniad MLA

 Moore, Randy.  Understanding Galápagos: What You''ll See and What It Means.  McGraw-Hill, 2013.

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