Heitman, S. (1969). Nikolai I. Bukharin: A bibliography, with annotations, including the locations of his works in major American and European libraries. Hoover Institution on War, Revolution and Peace, Stanford University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Heitman, Sidney. Nikolai I. Bukharin: A Bibliography, with Annotations, Including the Locations of His Works in Major American and European Libraries. Stanford: Hoover Institution on War, Revolution and Peace, Stanford University, 1969.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Heitman, Sidney. Nikolai I. Bukharin: A Bibliography, with Annotations, Including the Locations of His Works in Major American and European Libraries. Hoover Institution on War, Revolution and Peace, Stanford University, 1969.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.