APA

Sandburg C., . (1982). Abraham Lincoln, the prairie years and the war years. New York: A harvest book.

Chicago

Sandburg Carl, . 1982. Abraham Lincoln, the prairie years and the war years. New York: A harvest book.

Harvard

Sandburg C., . (1982). Abraham Lincoln, the prairie years and the war years. New York: A harvest book.

MLA

Sandburg Carl, . Abraham Lincoln, the prairie years and the war years. New York: A harvest book. 1982.