Gyasi Obeng, S. West African Languages in Contact with European Languages: Samuel Gyasi Obeng. Africa meets Europe : language contact in West Africa.(2004).
Citace podle Chicago (17th ed.)Gyasi Obeng, Samuel. "West African Languages in Contact with European Languages: Samuel Gyasi Obeng." Africa Meets Europe : Language Contact in West Africa.(2004) .
Citace podle MLA (8th ed.)Gyasi Obeng, Samuel. "West African Languages in Contact with European Languages: Samuel Gyasi Obeng." Africa Meets Europe : Language Contact in West Africa.(2004), .
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