Saka Ajie Brhamantya, author
2017
UI - Skripsi (Membership)
Dandy Dalendrajaya Putra, author
2014
UI - Skripsi (Membership)
Helfert, Erich A., author
Erlangga, 1997
Buku Referensi
Helfert, Erich A., author
Richard D. Irwin, 1967
Buku Teks
Helfert, Erich A., author
Richard D. Irwin, 1982
Buku Teks