Clark, W. (1888). Witnesses to Christ: A contribution to Christian apologetis. McClurg.
Lua i Stíl Chicago (17ú heag.)Clark, William. Witnesses to Christ: A Contribution to Christian Apologetis. Chicago: McClurg, 1888.
Lua MLA (9ú heag.)Clark, William. Witnesses to Christ: A Contribution to Christian Apologetis. McClurg, 1888.
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