Citação norma APA

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

Citação norma Chicago

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

Citação norma MLA

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

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.