Παραπομπή σε μορφή APA (7η εκδ.)

Gyasi Obeng, S. West African Languages in Contact with European Languages: Samuel Gyasi Obeng. Africa meets Europe : language contact in West Africa.(2004).

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gyasi Obeng, Samuel. "West African Languages in Contact with European Languages: Samuel Gyasi Obeng." Africa Meets Europe : Language Contact in West Africa.(2004) .

Παραπομπή σε μορφή MLA (8th εκδ.)

Gyasi Obeng, Samuel. "West African Languages in Contact with European Languages: Samuel Gyasi Obeng." Africa Meets Europe : Language Contact in West Africa.(2004), .