Lịngwistiks
Peter_Ladefoged
Alexander_John_Ellis
Mkpụrụ_akwụkwọ_Bekee
Mkpụrụ_akwụkwọ_izi_ihe_mbụ
Ụkpụrụ_mkpụrụ_akwụkwọ
Ụda_na-ese_n'elu_mmiri
Ịmata_ụdaolu
Nnyocha_ụdaume
Orton-Gillingham
Mkpụrụ_okwu_ụdaume