Berthoff, W. (1989). Hart Crane: A re-introduction / Warner Berthoff. University of Minnesota Press.
Lua i Stíl Chicago (17ú heag.)Berthoff, Warner. Hart Crane: A Re-introduction / Warner Berthoff. Minneapolis, Minn.: University of Minnesota Press, 1989.
Lua MLA (8ú heag.)Berthoff, Warner. Hart Crane: A Re-introduction / Warner Berthoff. University of Minnesota Press, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.