APA

Poguntke T., Webb P., . (2005). The presidentialization of politics. Oxford: Oxford University Press.

Chicago

Poguntke Thomas, Webb Paul, . 2005. The presidentialization of politics. Oxford: Oxford University Press.

Harvard

Poguntke T., Webb P., . (2005). The presidentialization of politics. Oxford: Oxford University Press.

MLA

Poguntke Thomas, Webb Paul, . The presidentialization of politics. Oxford: Oxford University Press. 2005.