Anuman, Rajadhon Phraya, author
National Culture Institute, 1956
Buku Teks
Mort, Frank, author
Routledge, 1996
Buku Teks
University League for Social Reform; edited by Peter Russell
McGraw-Hill, 1966
Buku Teks
Backing, Richard C
James Lewis ,
Buku Teks
Ottawa Departemen of External Affairs 1963
Buku Teks