McDonald, Robert L., author
Pearson Education, 2006
Multimedia
Universitas Indonesia, 1998
UI - Skripsi (Membership)
Baxter, Martin
Cambridge university press, 1996
Buku Teks
Hirsa, Alih, editor
Academic Press, 2014
eBooks
Oktavia, author
2017
UI - Makalah dan Kertas Kerja