Halko, J. (1950). Religious census, District of Columbia: General summary. Washington Federation of Churches.
Citace podle Chicago (17th ed.)Halko, John. Religious Census, District of Columbia: General Summary. Washington, D.C.: Washington Federation of Churches, 1950.
Citace podle MLA (8th ed.)Halko, John. Religious Census, District of Columbia: General Summary. Washington Federation of Churches, 1950.
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