Anloy, Robert Alexander Louis, author
Fakultas Ekonomi Universitas Indonesia, 1988
UI - Skripsi (Membership)
Thierauf, Robert J., author
Prentice-Hall, 1982
Buku Teks
Thierauf, Robert J., author
Prentice-Hall International, 1988
Buku Teks
Julius Hermawan, author
Andi , 2005
Buku Teks
Sprague, Ralph H., author
Prentice-Hall, 1995
Buku Teks