Simanjuntak, Johannes Roberto Hasibuan, author
Universitas Indonesia, 2010
UI - Skripsi (Open)
Riduan Syahrani, author
Alumni, 1978
Buku Teks
Sudaryatmo, author
Citra Aditya Bakti, 1996
Buku Teks
Simanjuntak, Payaman Jan, author
Himpunan Pembina Sumberdaya Manusia Indonesia (HIPSMI), 1992
Buku Teks
Rachmadhi Purwana, author
UI-Press, 2010
UI - Pidato