International Symposium on Chadic Linguistics Boulder, Colo, ebrary, Inc, & Frajzyngier, Z. (1989). Current progress in Chadic linguistics: Proceedings of the International Symposium on Chadic Linguistics, Boulder, Colorado, 1-2 May, 1987. J. Benjamins Pub. Co..
Чикаго-гийн эшлэл (17 дахь хэвлэлт)International Symposium on Chadic Linguistics Boulder, Colo, Inc ebrary, ба Zygmunt Frajzyngier. Current Progress in Chadic Linguistics: Proceedings of the International Symposium on Chadic Linguistics, Boulder, Colorado, 1-2 May, 1987. Amsterdam ; Philadelphia: J. Benjamins Pub. Co., 1989.
MLA -ийн эшлэл (9 дэх хэвлэлт)International Symposium on Chadic Linguistics Boulder, Colo, et al. Current Progress in Chadic Linguistics: Proceedings of the International Symposium on Chadic Linguistics, Boulder, Colorado, 1-2 May, 1987. J. Benjamins Pub. Co., 1989.