Gaya APA
      Unseth, P. (1990).
    Linguistic bibliography of the non-semitic languages of Ethiopia. Series editors: Harold G. Marcus & John T. Hinnant.    .
     Michigan:
   Michigan African Studies Center.
  
Gaya MLA
      Unseth, Peter.
    "Linguistic bibliography of the non-semitic languages of Ethiopia. Series editors: Harold G. Marcus & John T. Hinnant.   ".
    
     Michigan:
   Michigan African Studies Center,
  1990.
  Buku.