Sibthorp, R. W. (1842). Substance of a sermon preached in the Cathedral Church of St. Chad, Birmingham, on the morning of St. Patrick's day, 1842. London.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sibthorp, Richard Waldo. Substance of a Sermon Preached in the Cathedral Church of St. Chad, Birmingham, on the Morning of St. Patrick's Day, 1842. London, 1842.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Sibthorp, Richard Waldo. Substance of a Sermon Preached in the Cathedral Church of St. Chad, Birmingham, on the Morning of St. Patrick's Day, 1842. London, 1842.
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