Christopher P. Holstege... [et al.]
Jones and Bartlett Publishers LLC , 2001
Buku Teks SO
edited by Steven R. Donziger and Steven R. Donziger
HarperCollins, 1996
Buku Teks
Runturambi, Arthur Josias Simon
FISIP UI Press, 2012
UI - Publikasi
Silbermaan, Charles E.
Random House, 1978
Buku Teks
Artikel Jurnal