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^Wentum, Comfort. 1997. A Lexical Tonology of Ga. Legon: University of Ghana, M. Phil thesis.
^Clements, G. N. and Kevin C. Ford. 1979. "Kikuyu tone shift and its synchronic consequences." Linguistic Inquiry 10: 179-210.
^Kropp-Dakubu, Mary E. 1986. "Downglide, floating tones and non-WH questions in Ga and Dangme." The Phonological Representation of Suprasegmentais, ed. by Koen Bogers, Harry van der Hulst, and Maarten Mous. Dordrecht: Foris Publications. Pp. 153-173.
^Zimmerman, 1. 1858. A grammatical sketch and vocabulary of the Akra- or Galanguage with an appendix on the Adanme dialect. Stuttgart, 2 vols. Republished with an Introduction by 1. Berry, Gregg International, 1972.