Library of Congress. Subject Cataloging Division, Gale Research Company, & Savage, H. (1982). Classification schedules, Class P, philology & literature, subclass PT, part 1, German literature: A cumulation of additions and changes through 1981. Gale Research Co..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Library of Congress. Subject Cataloging Division, Gale Research Company, و Helen Savage. Classification Schedules, Class P, Philology & Literature, Subclass PT, Part 1, German Literature: A Cumulation of Additions and Changes Through 1981. Detroit, Mich.: Gale Research Co., 1982.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Library of Congress. Subject Cataloging Division, et al. Classification Schedules, Class P, Philology & Literature, Subclass PT, Part 1, German Literature: A Cumulation of Additions and Changes Through 1981. Gale Research Co., 1982.