Thomson, W. (1877). The worth of life: An address delivered at the opening of the fifty-eighth session of the Leeds philosophical and literary society, on Tuesday, the 23rd of October, 1877. J. Murray.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Thomson, William. The Worth of Life: An Address Delivered at the Opening of the Fifty-eighth Session of the Leeds Philosophical and Literary Society, on Tuesday, the 23rd of October, 1877. London: J. Murray, 1877.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Thomson, William. The Worth of Life: An Address Delivered at the Opening of the Fifty-eighth Session of the Leeds Philosophical and Literary Society, on Tuesday, the 23rd of October, 1877. J. Murray, 1877.
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