Ratna Marina
Fakultas Ekonomi Universitas Indonesia, 1987
UI - Skripsi Membership
Tyson, Shaum
Prentice-Hall, 2000
Buku Teks SO
Robbins, Stephen P.
Prentice-Hall, 2009
Buku Teks SO
Weightman, Jane
Addison-Wesley, 1999
Buku Teks SO
Wasilah
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1993
UI - Skripsi Membership