Crapo, Richley H., author
McGraw-Hill, 2002
Buku Teks
Universitas Indonesia, 1995
UI - Laporan Penelitian
Soemoenoe, author
Universitas Indonesia, 1998
UI - Tesis (Membership)
Miller, Barbara D., author
Pearson Education, 2005
Buku Teks
Dimen-Schein, Muriel, author
McGraw-Hill, 1977
Buku Teks