edited by Miguel S. Wionczek
Frederick A. Praeger, 1966
Buku Teks
edited by Richard Mann
Gateway Books, 2000
Buku Teks
Organization for Economic Co-operation and Development, 1965
Buku Teks
Frank, Isaiah
Md. Johns Hopkins University Press, 1980
Buku Teks
United Nations, 1983
Buku Teks