Menz, Fredric C., author
Harper Collins College Publisers, 1993
Buku Teks
Lipsey, Richard G., 1928-, author
Harper & Row , 1988
Buku Teks
Walstad, William B., author
McGraw-Hill, 2002
Buku Teks
Clark, James E., author
Houghton Mifflin, 2002
Buku Teks
Hyman, David N., author
Richard D. Irwin, 1971
Buku Teks