Maciariello, Joseph A., author
McGraw-Hill, 2011
Buku Teks
Wormer, Katherine Stuart van, author
Oxford University Press, 2017
Buku Teks
Steers, Richard M., author
Kent Publishing, 1985
Buku Teks
Taufik Pribadi, author
1999
UI - Tesis (Membership)
Tabana, author
1999
UI - Tesis (Membership)