ebrary, Inc, Crummey, R. O., & Berry, L. E. (1968). Rude & barbarous kingdom: Russia in the accounts of sixteenth-century English voyagers. University of Wisconsin Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc, Robert O. Crummey, و Lloyd E. Berry. Rude & Barbarous Kingdom: Russia in the Accounts of Sixteenth-century English Voyagers. Madison: University of Wisconsin Press, 1968.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc, et al. Rude & Barbarous Kingdom: Russia in the Accounts of Sixteenth-century English Voyagers. University of Wisconsin Press, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.