Darbishire, Helen, 1881-1961
Oxford University Press, 1949
Buku Teks SO
Hubbard, L. Ron, 1911-1986
Bridge Publications, 2012
Buku Referensi
Dasgupta, Surendranath
Calcutta Mitra & Ghosh [t.th.]
Buku Teks
Hasluck, Paul
Hawthorn Press, 1975
Buku Teks SO
Ha, Tae Hung
Yonsei University Press, 1972
Buku Teks SO