Harper, W. A. (1921). The church in the present crisis. Fleming H. Revell.
Lua i Stíl Chicago (17ú heag.)Harper, William Allen. The Church in the Present Crisis. Fleming H. Revell, 1921.
Lua MLA (9ú heag.)Harper, William Allen. The Church in the Present Crisis. Fleming H. Revell, 1921.
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