Avramovic, Dragoslav
The Johns Hopkins Press , 1964
Buku Teks
Avramovic, Dragoslav
The Johns Hopkins Press , 1958
Buku Teks
Donnelly, Thomas C.
The University of New mexico Press, 1953
Buku Teks
Pick, James B.
Westview , 1989
Buku Referensi
Dullemen, Inez van
Querido, 1988
Buku Teks