Lewis, William Arthur, 1915-, author
Public Affairs, 1951
Buku Teks
Keilhau, Wilhelm, author
George Allen & Unwin, 1951
Buku Teks
Lewis, William Arthur, 1915-, author
George Allen & Unwin, 1951
Buku Teks
Boulding, Kenneth E. (Kenneth Ewart), 1910-1993, author
Prentice-Hall, 1958
Buku Teks
Lewis, William Arthur, 1915-, author
Harper & Row, 1966
Buku Teks