Academic Press, 2015
eBooks
Borkenau, Franz
University of Michigan Press, 1962
Buku Teks
Bugajski, Janusz, author
Westview Press, 1991
Buku Teks
Nollau, Gùˆnther, 1911-1991, author
Frederick A. Praeger, 1961
Buku Teks
Todaro, Michael P., author
Erlangga, 1994
Buku Teks