Heilenman, L. Kathy.
Harper & Row, [date of publication not identified]
Buku Teks
Wise, Claude Merton
Prentice-Hall, 1957
Buku Teks
Winter, Léon de, 1954-, author
De Bezige Bij, 1996
Buku Teks
Claude, Inis L., author
Random House , 1976
Buku Teks
Claude, Inis L., author
Random House, 1964
Buku Teks