Cita APA (7th ed.)
Thorp, W. (1963). American writing in the twentieth century. Harvard University Press.
Cita Chicago (17th ed.)
Thorp, Willard. American Writing in the Twentieth Century. Cambridge: Harvard University Press, 1963.
Cita MLA (9th ed.)
Thorp, Willard. American Writing in the Twentieth Century. Harvard University Press, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.