APA استشهاد

Corwin, E. S. (1957). The president office and powers 1787-1957: History analysis of practice and opinion (4th ed.). NewYork university press.

استشهاد بنمط شيكاغو

Corwin, Edward S. The President Office and Powers 1787-1957: History Analysis of Practice and Opinion. 4th ed. NewYork: NewYork university press, 1957.

MLA استشهاد

Corwin, Edward S. The President Office and Powers 1787-1957: History Analysis of Practice and Opinion. 4th ed. NewYork university press, 1957.