Paul Randolph E.
Little, Brown & Co., 1954
Buku Teks
American Economic Association
George Allen and Unwin, 1959
Buku Teks
Burke, Karen C., 1951-, author
West Publishing, 1992
Buku Teks
Burke, Karen C., 1951-, author
Thomson/West, 1999
Buku Teks
Gelfand, M. David, author
West Publishing, 1986
Buku Teks