Department of State Publication,, 1961
Buku Teks SO
Ngoc, Nguyen
Foreign Languages Publishing House, 1961
Koleksi Publik
Fall, Bernard B.
Frederick A. Praeger , 1966
Buku Teks SO
Van Arkadie, Brian
Asia Pacific Press at the National Library of Australia, 2004
Buku Teks SO
Langer, William L.
P. Smith, 1968
Buku Teks SO