APA-referens

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

Chicago-stil citat

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

MLA-referens

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