Guirardello, Raquel. 1999. "Trumai." In Amazonian Languages, edited by R. M. W. Dixon and Alexandra Y. Aikhenvald. 351-535. Cambridge University Press.
Gueye, G. 1986. "Les Correlats Articulatoires Et Acoustiques De La Distinction +/- ATR En Ndut." In Travaux de l'Institut de Phonetique de Strasbourg, 18: 137-249.
Gudschinsky, S. C., F. Popovich and H. Popovich. 1970. "Native Reaction and Phonetic Similarity in Maxakali Phonology." In Language, 46: 77-88.
Gowlett, Derek F. 1997. "Aspects of Yeyi Diachronic Phonology." In Namibian Languages: Reports and Papers, edited by W. H. G. Haacke and E. D. Elderkin. 235-263. Rüdiger Köppe.