Romein, Jan, author
E.M.Querido's, 1951
Buku Teks
edited by Willy Sellekaerts
Macmillan, 1974
Buku Teks
Tinbergen, Jan, 1903-, author
American Elsevier, 1975
Buku Teks
edited by Willy Sellekaerts
Macmillan, 1974
Buku Teks
Brown, Michael, author
Chang Jak iwa BT pyeong Sa, 1997
Buku Teks