Dyfyniad APA

May, P. (2010). Complete PET Workbook without answers. Cambridge University Press.

Dyfyniad Arddull Chicago

May, Peter. Complete PET Workbook Without Answers. Cambridge University Press, 2010.

Dyfyniad MLA

May, Peter. Complete PET Workbook Without Answers. Cambridge University Press, 2010.

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