Carter, P. A. (1969). The Idea of Progress in American Protestant Thought, 1930-1960. Philadelphia.
Lua i Stíl Chicago (17ú heag.)Carter, Paul Allen. The Idea of Progress in American Protestant Thought, 1930-1960. Philadelphia, 1969.
Lua MLA (8ú heag.)Carter, Paul Allen. The Idea of Progress in American Protestant Thought, 1930-1960. Philadelphia, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.