Lafage, P. 1978. "Les Langues Kru." In Inventaire des études linguistiques sur les pays d'Afrique noire d'expression française et sur Madagascar, edited by Daniel Barreteau. 85-100. Paris: Conseil international de la langue française.

Lacroix, P. F. 1962. "Note Sur La Langue Galke ." In Journal of African Languages, 1 , no. 2: 94-121.

Labatut, Roger. 1994. "Initiation Au Peul." Paris: INALCO.

Kunkel, Janet and Barbara Cameron. 2002. "A Sociolinguistic Survey of the Dhimba Language." In SIL Electronic Survey Reports, 2002-070: Online: http://www.sil.org/silesr/abstract.asp?ref=2002-070.

Marchese, Lynell. 1989. "Kru." In The Niger-Congo Languages: A Classification and Description of Africa's Largest Language Family, edited by John Bendor-Samuel. 119-139. Lanham: University Press of America.

Kratz, Corinne A. 1986. "Ethnic Interaction, Economic Diversification and Language Use: A Report On Research with Kaplelach and Kipchornwonek Okiek." In Sprache und Geschichte in Afrika, 7 , no. 2: 189-226.

Kratz, Corinne A. 1994. "Affecting Performance: Meaning, Movement, and Experience in Okiek Women's Initiation." Washington, D.C.: Smithsonian Institution Press.

Köhler, O. 1981. Les langues khoisan, section 1. In Les langues de l'Afrique Subsaharienne, edited by Jean Perrot. I: 557-615. Paris: Centre National de la Recherche Sciéntifique.

Köhler, O. 1981. "La Langue Kxoe." In Les langues de l'Afrique Subsaharienne, edited by Jean Perrot. I: 483-555. Paris: Centre National de la Recherche Sciéntifique.

Köhler, Oswin. 1971. "Die Khoe-sprachigen Buschmänner Der Kalahari: Ihre Verbreitung Und Gliederung." In Forschungen zur allgemeinen und regionalen Geographie: Festschrift für Kurt Kayser zur Vollendung des 65. Lebensjahres, 373-411. Wiesbaden: Franz Steiner.