John L. Maginn, Donald L. Tuttle, dennis W. Mcleavey, Jerald e. Pinto
John Wiley & Sons, 2007
Buku Teks
Gunawan Widjaja, author
Rajawali, 2008
Buku Teks
Elton, Edwin J., author
John Wiley & Sons, 1984
Buku Teks
Haavelmo, Trygve
University of Chicago Press , 1960
Buku Teks
Haugen, Robert A.
Prentice-Hall, 1990
Buku Teks