Calvani, Terry, author
Little, Brown, 1988
Buku Teks
Haas, Jeffrey J., author
West A Thomson Reuters Busines, 2011
Buku Teks
Posner, Richard A., author
The University of Chicago, 1976
Buku Teks
Posner, Richard A., author
Litle, Brown, 1980
Buku Teks
Tri Hartanto, author
Universitas Indonesia, 2011
UI - Tesis (Open)