Orient Mercur-Verlag, 1958
Buku Teks SO
Runes, Dagobert D.
Paterson, 1963
Buku Teks SO
Ministry of Information and Broadcasting Government of India, 1950
Buku Teks SO
Berbar, Halim
Times Editions-Marshall Cavendish, 2004
Buku Referensi
Foreign Languages press, 1953
Buku Teks SO