Cressey, George Babcock, 1896-1963, author
Whittlesey house, McGraw-Hill book company inc., 1944
Buku Teks
Cressey, George Babcock, 1896-1963, author
McGraw-Hill, 1951
Buku Teks
Lebra, Joyce C.
Jakarta Pustaka Sinar Harapan 1988,
Buku Teks
Koninklijk Instituut voor Taal-,Land -en Volkenkunde (KITLV) Press,
Majalah, Jurnal, Buletin
Korea : Asiatic Research Center
Majalah, Jurnal, Buletin