Jahn, J., Schild, U., & Nordmann, A. (1972). Who's who in African literature: Biographies, works, commentaries / Janheinz Jahn; Ulla Schild; Almut Nordmann. Publ. for the German Africa Society. [In collaboration with Inter Nationes]. Erdmann.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Jahn, Janheinz, Ulla Schild, و Almut Nordmann. Who's Who in African Literature: Biographies, Works, Commentaries / Janheinz Jahn; Ulla Schild; Almut Nordmann. Publ. for the German Africa Society. [In Collaboration with Inter Nationes]. Tübingen ; Basel: Erdmann, 1972.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Jahn, Janheinz, et al. Who's Who in African Literature: Biographies, Works, Commentaries / Janheinz Jahn; Ulla Schild; Almut Nordmann. Publ. for the German Africa Society. [In Collaboration with Inter Nationes]. Erdmann, 1972.