Lewis, William Arthur, 1915-
Harper & Row, 1966
Buku Teks
Caiden, Naomi
John Wiley & Sons, 1974
Buku Teks
Saeed, Khalid
Avebury, 1994
Buku Teks
selected by a committee of the American Economic Association
George Allen and Unwin, 1955
Buku Teks
Hansen, Alvin Harvey, 1887-1975
W.W. Norton, 1941
Buku Teks