(1633). Helpes to humiliation. By Robert Bolton. And published before his death. [electronic resource].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Helpes to Humiliation. By Robert Bolton. And Published Before His Death. [electronic Resource]. 1633.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Helpes to Humiliation. By Robert Bolton. And Published Before His Death. [electronic Resource]. 1633.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.