एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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