Olson, Kenneth S.; Reiman, D. William; Sabio, Fernando; da Silva, Filipe Alberto. The voiced linguolabial plosive in Kajoko. Journal of West African Languages. 2013, 42 (2): 68 [2018-10-05]. (原始内容存档于2021-01-25) (英语).
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Olson, Kenneth S.; Reiman, D. William; Sabio, Fernando; da Silva, Filipe Alberto. The voiced linguolabial plosive in Kajoko. Journal of West African Languages. 2013, 42 (2): 68 [2018-10-05]. (原始内容存档于2021-01-25) (英语).