Dyfyniad APA

Heyderman, E. (2010). Complete PET Student's book with answers. Cambridge University Press.

Dyfyniad Arddull Chicago

Heyderman, Emma. Complete PET Student's Book With Answers. Cambridge University Press, 2010.

Dyfyniad MLA

Heyderman, Emma. Complete PET Student's Book With Answers. Cambridge University Press, 2010.

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