Lorand, A. (1923). Old age deferred: The causes of old age and its postponement by hygienic and therapeutic measures (5th ed.). F. A. Davis.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lorand, Arnold. Old Age Deferred: The Causes of Old Age and Its Postponement by Hygienic and Therapeutic Measures. 5th ed. Philadelphia: F. A. Davis, 1923.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Lorand, Arnold. Old Age Deferred: The Causes of Old Age and Its Postponement by Hygienic and Therapeutic Measures. 5th ed. F. A. Davis, 1923.
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