Balassa, Bela A., author
Harvester Wheatsheaf, 1989
Buku Teks
Meier, Gerald M., author
Harper & Row, 1968
Buku Teks
Hartland-Thunberg, Penelope, author
Westview Press, 1980
Buku Teks
Hasna Alifa, author
2019
UI - Skripsi (Membership)
Salvatore, Dominick, author
John Wiley & Sons, 2007
Buku Teks