Veblen, Thorstein
The Viking Press, Inc., 1954
Buku Teks
edited by S. Prakash Sethi and Carl L. Swanson
John Wiley & Sons, 1981
Buku Teks
Raffaele, Joseph Antonio
John Wiley & Sons, 1974
Buku Teks
Anderson, Thomas J.
South- Western , 1958
Buku Teks
Hamilton, Walton
McGraw-Hill Book Company , 1938
Buku Teks