Clifford, R. J. (1991). Proverbs: A commentary. Westminister John Knox.
Lua i Stíl Chicago (17ú heag.)Clifford, Richard J. Proverbs: A Commentary. Louisville: Westminister John Knox, 1991.
Lua MLA (9ú heag.)Clifford, Richard J. Proverbs: A Commentary. Westminister John Knox, 1991.
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