Malabre, Alfred L., author
Dow Joner-Irvin, 1989
Buku Teks
Grampp, William D.
Richard D. Irwin , 1953
Buku Teks
Heilbroner, Robert L., author
Simon & Schuster, 1994
Buku Teks
Albrecht, Karl, 1941-, author
Dow Jones-Irwin , 1985
Buku Teks
Musolf, Lloyd D.
Scott, Foresman and Company, 1965
Buku Teks