Bonger, Willem Adriaan, 1876-1940, author
Pembangunan, 1970
Buku Teks
Mulyana W. Kusumah, author
Armico, 1984
Buku Teks
Carrabine, Eamonn, author
Routledge, 2009
Buku Referensi
Copes, Heith, author
McGraw-Hill, 2009
Buku Teks
Sykes, Gresham M., author
Random Hoese, 1963
Buku Teks