APA (7th ed.) Citation

Held, D. (2006). Models of democracy (3rd ed.). Polity.

Chicago Style (17th ed.) Citation

Held, David. Models of Democracy. 3rd ed. Cambridge, UK ; Malden, MA: Polity, 2006.

MLA (9th ed.) Citation

Held, David. Models of Democracy. 3rd ed. Polity, 2006.