एपीए उद्धरण

Maass, M. (2020). The World Views of the Obama Era. 1st ed. 2018. Springer International Publishing.

शिकागो स्टाइल उद्धरण

Maass, Matthias. The World Views of the Obama Era. 1st Ed. 2018. Springer International Publishing, 2020.

एमएलए उद्धरण

Maass, Matthias. The World Views of the Obama Era. 1st Ed. 2018. Springer International Publishing, 2020.