K. Black, K. Mrs, and . Black, The Moro language: grammar and dictionary. Khartoum: Faculty of Arts, 1971.

C. and G. Tucker, A grammar of Kissi, a southern Atlantic language, 1995.

F. and A. Gwenaëlle, Etude du samba leko -parler d'Allani (Cameroun du Nord, famille Adamawa), 2003.

G. and R. G. Jr, Ethnologue: Languages of the World, Fifteenth edition, 2005.

H. and R. Stephen, Nama Hottentot grammar, 1977.

K. Lojenga and C. C. , Bila (D32), pp.450-474, 2003.

M. and C. T. Schadeberg, Kinyamwezi: grammar, texts, vocabulary, 1992.

P. Gérard, &. Derek, and N. , Gweno, a little known Bantu language of Northern Tanzania, Lugha za Tanzania/Languages of Tanzania, 2000.

S. , T. C. Philip, and E. , A description of the Orig language (Southern Kordofan), based on the notes of Fr. Carlo Muritori, Musée Royal de l'Afrique Centrale (MRAC), 1979.

R. C. Stevenson, The Otoro language. ms, 1943.

W. and W. Everett, African language structures, 1973.

W. and W. E. Welmers, Noun Modifiers in Igbo, International Journal of American Linguistics, vol.35, issue.4, pp.315-322, 1969.
DOI : 10.1086/465076

Z. Leyew, The Kemantney language: a sociolinguistic and grammatical study of language replacement, 2003.