Krukowski, E. J. An Epic Journey to Brazil: The Exile Poems of Julian Tuwin and Ulrich Becher: Elizabeth J. Krukowski. Latin America and the literature of exile : a comparative view of the 20. century European refugee writers in the New World.(1983).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Krukowski, Elizabeth J. "An Epic Journey to Brazil: The Exile Poems of Julian Tuwin and Ulrich Becher: Elizabeth J. Krukowski." Latin America and the Literature of Exile : A Comparative View of the 20. Century European Refugee Writers in the New World.(1983) .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Krukowski, Elizabeth J. "An Epic Journey to Brazil: The Exile Poems of Julian Tuwin and Ulrich Becher: Elizabeth J. Krukowski." Latin America and the Literature of Exile : A Comparative View of the 20. Century European Refugee Writers in the New World.(1983), .