Elis Fransisca, author
Universitas Indonesia, 2007
UI - Skripsi (Membership)
Chin, Yee Wah, author
Pearson Prentice Hall, 2004
Buku Teks
Harrington, Scott E., author
McGraw-Hill, 2004
Buku Teks
Harrington, Scott E., author
McGraw-Hill, 2003
Buku Teks
Situmeang, L.Trinita, author
Universitas Indonesia, 2011
UI - Tesis (Open)