Universitas Indonesia, 2004
UI - Tugas Akhir
FAG Kugelfischer Georg Schafer & Co., [date of publication not identified]
Buku Teks
Frick, Heinz, author
Kanisius, 2010
Buku Teks
Damanik, Novitasari R., author
Fakultas Psikologi Universitas Indonesia, 2016
UI - Tesis (Membership)
Artikel Jurnal