Universitas Indonesia, 2008
UI - Skripsi (Membership)
Universitas Indonesia, 2013
UI - Skripsi (Membership)
Grogono, Peter
Addison-Wesley, 1982
Buku Teks
Universitas Indonesia, 2008
UI - Skripsi (Membership)
Koffman, Elliot B.
Addison-Wesley, 1981
Buku Teks