Barker, E. (1989). Political thought: From herbert spencer to the present day. Printwell.
استشهاد بنمط شيكاغوBarker, Ernest. Political Thought: From Herbert Spencer to the Present Day. Jaipur: Printwell, 1989.
MLA استشهادBarker, Ernest. Political Thought: From Herbert Spencer to the Present Day. Printwell, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.