Butler, S. T. (1965). Time: Selected lectures on time and relativity, the arrow of time and the relation of geological and biological time on men of science. Pergamon.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Butler, Stuart Thomas. Time: Selected Lectures on Time and Relativity, the Arrow of Time and the Relation of Geological and Biological Time on Men of Science. Oxford: Pergamon, 1965.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Butler, Stuart Thomas. Time: Selected Lectures on Time and Relativity, the Arrow of Time and the Relation of Geological and Biological Time on Men of Science. Pergamon, 1965.
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