Dorfman, Robert, author
Prentice-Hall of India, 1970
Buku Teks
Dorfman, Robert, author
Prentice-Hall, 1965
Buku Teks
Veblen, Thorstein, author
The Viking Press, Inc., 1954
Buku Teks
Leftwich, Richard H., author
Dryden Press, 1985
Buku Teks
Veblen, Throstein
The Viking Press, Inc. , 1934
Buku Teks