Clark, H. H. (1967). Transitions in American literary history. Octagon Books.
Lua i Stíl Chicago (17ú heag.)Clark, Harry Hayden. Transitions in American Literary History. New York: Octagon Books, 1967.
Lua MLA (9ú heag.)Clark, Harry Hayden. Transitions in American Literary History. Octagon Books, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.