Artikel Jurnal
Nasution, Abdul Haris, 1918-2000, author
Seruling Masa, 1971
Buku Teks
Ahuja, B. N., author
Surjeet Publications, 1989
Buku Teks
Severino, Rodolfo C., Jr., author
ASEAN Secretariat, 2002
Buku Teks
edited by Monrad G. Paulsen
Columbia University Press, 1959
Buku Teks