Douglass, H. P. (1947). The greater Cincinnati church study. Council of Churches of Greater Cincinnati.
Lua i Stíl Chicago (17ú heag.)Douglass, H. Paul. The Greater Cincinnati Church Study. Cincinnati, Ohio: Council of Churches of Greater Cincinnati, 1947.
Lua MLA (8ú heag.)Douglass, H. Paul. The Greater Cincinnati Church Study. Council of Churches of Greater Cincinnati, 1947.
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