Little, Ian M.D.
At the Clarendon Press , 1953
Buku Teks
Dorfman, Robert, author
Prentice-Hall, 1965
Buku Teks
Stigler, George J., author
Macmillan, 1957, c.1942
Buku Teks
Stigler, George J., author
Macmillan, 1966
Buku Teks
Dorfman, Robert, author
Prentice-Hall of India, 1970
Buku Teks