APA-viite

Barker, E. (1989). Political thought: From herbert spencer to the present day. Printwell.

Chicago-tyylinen lähdeviittaus

Barker, Ernest. Political Thought: From Herbert Spencer to the Present Day. Jaipur: Printwell, 1989.

MLA-viite

Barker, Ernest. Political Thought: From Herbert Spencer to the Present Day. Printwell, 1989.