Barton, G., author
Clarendon Press, 1989
Buku Teks
Favini, Angelo, author
Springer, 2012
eBooks
Gitman D. M., author
Springer , 2012
eBooks
Ajeng Makhriyani, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2012
UI - Skripsi (Open)
Heckenbach, Alan J., author
Macmillan, 1970
Buku Teks