Ressa Kusuma
2017
UI - Skripsi Membership
Lumbangaol, Sanggam Hendrick
Fakultas Teknik Universitas Indonesia, 2009
UI - Skripsi Open
David Butler, Christopher James Digman, Christos Makropoulos and John W. Davies.
CRC Press, 2018
Buku Teks SO
Kaufman, Martin M.
CRC Press, 2011
Buku Teks
Nurbaity
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2015
UI - Tesis Membership