Crawford, Ann Caddell
Charles E. Tuttle, [Date of publication not identified]
Buku Teks SO
Jakarta : Kompen
Majalah, Jurnal, Buletin
Kuala Lumpur : MBRAS (Malaysian Branch of the Royal Asiatic Society)
Majalah, Jurnal, Buletin
India : Ramananda Chatterjee
Majalah, Jurnal, Buletin
Nanking (China) : The Council of International Affairs
Majalah, Jurnal, Buletin