APA-referens (7:e uppl.)
Wessels, W., Mittag, J., & Maurer, A. (2021). Fifteen into one?: The European Union and its member states. Manchester University Press.
Chicago-referens (17:e uppl.)
Wessels, Wolfgang, Jürgen Mittag, och Andreas Maurer. Fifteen into One?: The European Union and Its Member States. Manchester University Press, 2021.
MLA-referens (9:e uppl.)
Wessels, Wolfgang, et al. Fifteen into One?: The European Union and Its Member States. Manchester University Press, 2021.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.