Rivers-Smith, S.
Oxford University Press, 1949
Buku Teks SO
edited by Clarence L. Barnhart and Robert K. Barnhart
World Book-Childcraft International, 1978
Buku Referensi
Pincas, Anita
Macmillan, 1983
Buku Teks SO
edited by H.A. Treble
Oxford University Press, 1951
Buku Teks SO
McKay, Herbert
Oxford University Press, 1950
Buku Teks SO