Levstik, Linda S., author
Routledge, 2011
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Artikel Jurnal
Binney, Judith
Allen & Unwin, 1990
Buku Teks
Kerrigan, Michael
Leicestershire Southwater, 2011
Buku Referensi
Das, Rasamandala, author
Leicestershire Lorenz Books, 2012
Buku Referensi