APA

Robertson D., . (1993). Penguin dictionary of politics. : Penguin Books, England.

Chicago

Robertson David, . 1993. Penguin dictionary of politics. : Penguin Books, England.

Harvard

Robertson D., . (1993). Penguin dictionary of politics. : Penguin Books, England.

MLA

Robertson David, . Penguin dictionary of politics. : Penguin Books, England. 1993.