Holmes, Sandra Le Brun
Penguin Books, 1999
Buku Teks
Keneally, Thomas, 1935-, author
Rand McNally, 1984
Buku Teks
Maris, Hyllus, author
Currency Press, 1985
Buku Teks
Berndt, Catherine H., author
Pitman, 1983
Buku Teks
Groensmit, K. H.
Nijmegen Centrale Drukkerij 1950
Buku Teks