Timotius Kurniawan, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2012
UI - Skripsi Open
Gomberg, Karen Cornell, author
McFarland & Co. , 1990
Buku Teks
Waldan Mufathir, author
2019
UI - Tesis Membership
Hughes, Arthur
Cambridge University Press, 1994
Buku Teks
Bennett, Albert B., author
McGraw-Hill , 2001
Buku Teks