Cita APA (7th ed.)
GRAY, R. (1976). American Poetry of the twentieth century. Cambridge Univ.Pr.
Cita Chicago (17th ed.)
GRAY, Richard. American Poetry of the Twentieth Century. Cambridge [usw.]: Cambridge Univ.Pr, 1976.
Cita MLA (9th ed.)
GRAY, Richard. American Poetry of the Twentieth Century. Cambridge Univ.Pr, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.