Gaya APA

H., N, G. (1983). THE LIFE OF HERBERT HOOVER; The Engineer, 1874-1914 . New York: Hoover Presidential Library Association, Inc.

Gaya MLA

H., Nash, George. "THE LIFE OF HERBERT HOOVER; The Engineer, 1874-1914". New York: Hoover Presidential Library Association, Inc, 1983. Textbook.