एपीए उद्धरण

Nelson, P. E. (2009). ISpeak. McGraw-Hill Higher Education.

शिकागो स्टाइल उद्धरण

Nelson, Paul E. ISpeak. McGraw-Hill Higher Education, 2009.

एमएलए उद्धरण

Nelson, Paul E. ISpeak. McGraw-Hill Higher Education, 2009.